Vulnerability-Lookup

CVE-2026-64102 (GCVE-0-2026-64102)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-08-05 12:39

Title

RDMA/siw: Reject MPA FPDU length underflow before signed receive math

Summary

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Reject MPA FPDU length underflow before signed receive math A malicious connected siw peer can send an iWARP FPDU whose MPA length field (c_hdr->mpa_len, 16 bit big-endian, peer-controlled) is smaller than the fixed DDP/RDMAP header for the announced opcode. Soft-iWARP parses the full header in siw_get_hdr() based on iwarp_pktinfo[opcode] .hdr_len, but never compares mpa_len against that header length. siw_tcp_rx_data() then derives srx->fpdu_part_rem = be16_to_cpu(mpa_len) - fpdu_part_rcvd + MPA_HDR_SIZE; where fpdu_part_rcvd equals iwarp_pktinfo[opcode].hdr_len at this point. For a tagged WRITE (hdr_len 16, MPA_HDR_SIZE 2) the smallest on-wire mpa_len of 0 yields fpdu_part_rem = -14, and any mpa_len below hdr_len - MPA_HDR_SIZE underflows to a negative int. The signed value then flows into siw_proc_write()/siw_proc_rresp() as bytes = min(srx->fpdu_part_rem, srx->skb_new); is handed to siw_check_mem() as an int len (whose interval check addr + len > mem->va + mem->len is satisfied for a valid base when len is negative), and reaches siw_rx_data() -> siw_rx_kva() / siw_rx_umem() -> skb_copy_bits() as a signed copy length. The header copy branch in skb_copy_bits() promotes that to size_t, producing a multi-gigabyte read. KASAN under a KUnit harness that drives the real kernel TCP receive path -- a loopback AF_INET socketpair, the malformed FPDU written via kernel_sendmsg, sk_data_ready firing in softirq, tcp_read_sock dispatching to siw_tcp_rx_data -- reports: BUG: KASAN: use-after-free in skb_copy_bits+0x284/0x480 Read of size 4294967295 at addr ffff888... Call Trace: skb_copy_bits siw_rx_kva siw_rx_data siw_check_mem siw_proc_write siw_tcp_rx_data __tcp_read_sock siw_qp_llp_data_ready tcp_data_ready tcp_data_queue Add the missing invariant at the earliest point where the peer header is fully assembled. iwarp_pktinfo[*].hdr_len - MPA_HDR_SIZE is exactly the value the siw transmitter uses as the minimum mpa_len for each opcode (drivers/infiniband/sw/siw/siw_qp.c:33), so this matches the protocol contract. Out-of-range FPDUs terminate the connection with TERM_ERROR_LAYER_LLP / LLP_ETYPE_MPA / LLP_ECODE_FPDU_START -- which is RFC 5044 Section 8 error code 3 ("Marker and ULPDU Length fields do not agree on the start of an FPDU"), the correct framing-error class for this inconsistency.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root Scorecard

References

8 references

URL	Tags
https://git.kernel.org/stable/c/683f7cfbf514193d6…
https://git.kernel.org/stable/c/4a331582011d9e808…
https://git.kernel.org/stable/c/33a8b5e971e294ec2…
https://git.kernel.org/stable/c/14553be882d9ce917…
https://git.kernel.org/stable/c/c7c0c0f4379dedec1…
https://git.kernel.org/stable/c/1012896f4225e8f80…
https://git.kernel.org/stable/c/775b4dc9618a99a1f…
https://git.kernel.org/stable/c/0ce1bc9e46ecabe84…

Impacted products

2 products

Vendor	Product	Version	CPE status
Linux	Linux	Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 683f7cfbf514193d63c0efa079f3352bde84c2e0 (git) Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 4a331582011d9e8089af8aa2a61ec6b4443bb245 (git) Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 33a8b5e971e294ec2a7b74211c545e09efd8e9ac (git) Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 14553be882d9ce91749c9d64041de66e34ad8e70 (git) Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < c7c0c0f4379dedec12d24dbb9dded5d2db7fd9f2 (git) Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 1012896f4225e8f801ff3c1648023845b66dfb11 (git) Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 775b4dc9618a99a1fa48b57554041a5dc17e1336 (git) Affected: 8b6a361b8c482f22ac99c3273285ff16b23fba91 , < 0ce1bc9e46ecabe84772bb561e373c0d9876d6f2 (git)	guessed
Linux	Linux	Affected: 5.3 Unaffected: 0 , < 5.3 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)	guessed

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Reject MPA FPDU length underflow before signed receive math\n\nA malicious connected siw peer can send an iWARP FPDU whose MPA length\nfield (c_hdr-\u003empa_len, 16 bit big-endian, peer-controlled) is smaller\nthan the fixed DDP/RDMAP header for the announced opcode. Soft-iWARP\nparses the full header in siw_get_hdr() based on iwarp_pktinfo[opcode]\n.hdr_len, but never compares mpa_len against that header length.\n\nsiw_tcp_rx_data() then derives\n\n    srx-\u003efpdu_part_rem = be16_to_cpu(mpa_len) - fpdu_part_rcvd\n                         + MPA_HDR_SIZE;\n\nwhere fpdu_part_rcvd equals iwarp_pktinfo[opcode].hdr_len at this\npoint. For a tagged WRITE (hdr_len 16, MPA_HDR_SIZE 2) the smallest\non-wire mpa_len of 0 yields fpdu_part_rem = -14, and any mpa_len below\nhdr_len - MPA_HDR_SIZE underflows to a negative int.\n\nThe signed value then flows into siw_proc_write()/siw_proc_rresp() as\n\n    bytes = min(srx-\u003efpdu_part_rem, srx-\u003eskb_new);\n\nis handed to siw_check_mem() as an int len (whose interval check\naddr + len \u003e mem-\u003eva + mem-\u003elen is satisfied for a valid base when\nlen is negative), and reaches siw_rx_data() -\u003e siw_rx_kva() /\nsiw_rx_umem() -\u003e skb_copy_bits() as a signed copy length. The header\ncopy branch in skb_copy_bits() promotes that to size_t, producing a\nmulti-gigabyte read.\n\nKASAN under a KUnit harness that drives the real kernel TCP receive\npath -- a loopback AF_INET socketpair, the malformed FPDU written via\nkernel_sendmsg, sk_data_ready firing in softirq, tcp_read_sock\ndispatching to siw_tcp_rx_data -- reports:\n\n    BUG: KASAN: use-after-free in skb_copy_bits+0x284/0x480\n    Read of size 4294967295 at addr ffff888...\n    Call Trace:\n     skb_copy_bits\n     siw_rx_kva\n     siw_rx_data\n     siw_check_mem\n     siw_proc_write\n     siw_tcp_rx_data\n     __tcp_read_sock\n     siw_qp_llp_data_ready\n     tcp_data_ready\n     tcp_data_queue\n\nAdd the missing invariant at the earliest point where the peer header\nis fully assembled. iwarp_pktinfo[*].hdr_len - MPA_HDR_SIZE is exactly\nthe value the siw transmitter uses as the minimum mpa_len for each\nopcode (drivers/infiniband/sw/siw/siw_qp.c:33), so this matches the\nprotocol contract. Out-of-range FPDUs terminate the connection with\nTERM_ERROR_LAYER_LLP / LLP_ETYPE_MPA / LLP_ECODE_FPDU_START -- which\nis RFC 5044 Section 8 error code 3 (\"Marker and ULPDU Length fields\ndo not agree on the start of an FPDU\"), the correct framing-error\nclass for this inconsistency."
        }
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            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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              "value": "AV:N - A remote attacker triggers this by sending a malformed iWARP FPDU over an established TCP connection; the kernel processes it in the TCP softirq receive path via siw_tcp_rx_data without any local access.\nAC:L - The attacker fully controls the peer-supplied mpa_len field and can reliably underflow fpdu_part_rem with a single crafted packet (e.g., mpa_len=0 on a tagged WRITE with hdr_len=16); no races or uncontrollable memory layout are required.\nPR:N - Exploitation requires only network reachability to a host running an iWARP listener (e.g., SMB Direct/RDMA-over-TCP on siw); completing the MPA/TCP handshake does not require any local account or elevated privileges on the victim system.\nUI:N - No victim user interaction is needed; the malformed FPDU is processed automatically when received on the connected TCP socket during normal kernel softirq handling.\nS:U - Impact is confined to kernel memory and RDMA-registered buffers on the victim host; this is standard in-kernel memory corruption without crossing a VM, container, or IOMMU security boundary.\nC:H - The negative copy length is promoted to a huge unsigned value in skb_copy_bits, producing a multi-gigabyte out-of-bounds read; KASAN confirmed use-after-free with a 4294967295-byte read, enabling arbitrary kernel memory disclosure.\nI:H - The same corrupted length drives skb_copy_bits writes into RDMA target memory (siw_rx_kva/siw_rx_umem) after siw_check_mem is bypassed by negative len, enabling out-of-bounds writes exploitable for memory corruption and potential code execution.\nA:H - KASAN reports use-after-free in skb_copy_bits during normal receive processing, and this class of kernel memory corruption reliably causes oops/panic or exploitable instability under attacker control."
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                  },
                  {
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                    "versionEndExcluding": "6.1.175",
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                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "FBFF77B0-526A-4AF1-84D0-ED7187624A67",
                    "versionEndExcluding": "6.6.142",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "9CB90BD9-95B7-4D7F-9F17-4ECE6CFB66C9",
                    "versionEndExcluding": "6.12.92",
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                    "vulnerable": true
                  },
                  {
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                  {
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                    "versionStartIncluding": "6.19",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "B1EF7059-E670-45F4-B422-54C40FA86390",
                    "vulnerable": true
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                    "matchCriteriaId": "0D38F0BF-A728-4133-A358-D44A2F7EE6D6",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "EC732D08-5F7B-46D9-B154-E60C7F4F0A97",
                    "vulnerable": true
                  },
                  {
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                    "matchCriteriaId": "E5910A9D-F60A-409A-B486-FE66BFEBA9B9",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/siw: Reject MPA FPDU length underflow before signed receive math\n\nA malicious connected siw peer can send an iWARP FPDU whose MPA length\nfield (c_hdr-\u003empa_len, 16 bit big-endian, peer-controlled) is smaller\nthan the fixed DDP/RDMAP header for the announced opcode. Soft-iWARP\nparses the full header in siw_get_hdr() based on iwarp_pktinfo[opcode]\n.hdr_len, but never compares mpa_len against that header length.\n\nsiw_tcp_rx_data() then derives\n\n    srx-\u003efpdu_part_rem = be16_to_cpu(mpa_len) - fpdu_part_rcvd\n                         + MPA_HDR_SIZE;\n\nwhere fpdu_part_rcvd equals iwarp_pktinfo[opcode].hdr_len at this\npoint. For a tagged WRITE (hdr_len 16, MPA_HDR_SIZE 2) the smallest\non-wire mpa_len of 0 yields fpdu_part_rem = -14, and any mpa_len below\nhdr_len - MPA_HDR_SIZE underflows to a negative int.\n\nThe signed value then flows into siw_proc_write()/siw_proc_rresp() as\n\n    bytes = min(srx-\u003efpdu_part_rem, srx-\u003eskb_new);\n\nis handed to siw_check_mem() as an int len (whose interval check\naddr + len \u003e mem-\u003eva + mem-\u003elen is satisfied for a valid base when\nlen is negative), and reaches siw_rx_data() -\u003e siw_rx_kva() /\nsiw_rx_umem() -\u003e skb_copy_bits() as a signed copy length. The header\ncopy branch in skb_copy_bits() promotes that to size_t, producing a\nmulti-gigabyte read.\n\nKASAN under a KUnit harness that drives the real kernel TCP receive\npath -- a loopback AF_INET socketpair, the malformed FPDU written via\nkernel_sendmsg, sk_data_ready firing in softirq, tcp_read_sock\ndispatching to siw_tcp_rx_data -- reports:\n\n    BUG: KASAN: use-after-free in skb_copy_bits+0x284/0x480\n    Read of size 4294967295 at addr ffff888...\n    Call Trace:\n     skb_copy_bits\n     siw_rx_kva\n     siw_rx_data\n     siw_check_mem\n     siw_proc_write\n     siw_tcp_rx_data\n     __tcp_read_sock\n     siw_qp_llp_data_ready\n     tcp_data_ready\n     tcp_data_queue\n\nAdd the missing invariant at the earliest point where the peer header\nis fully assembled. iwarp_pktinfo[*].hdr_len - MPA_HDR_SIZE is exactly\nthe value the siw transmitter uses as the minimum mpa_len for each\nopcode (drivers/infiniband/sw/siw/siw_qp.c:33), so this matches the\nprotocol contract. Out-of-range FPDUs terminate the connection with\nTERM_ERROR_LAYER_LLP / LLP_ETYPE_MPA / LLP_ECODE_FPDU_START -- which\nis RFC 5044 Section 8 error code 3 (\"Marker and ULPDU Length fields\ndo not agree on the start of an FPDU\"), the correct framing-error\nclass for this inconsistency."
          }
        ],
        "id": "CVE-2026-64102",
        "lastModified": "2026-08-12T15:49:23.140",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 9.8,
                "baseSeverity": "CRITICAL",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 3.9,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-07-19T16:17:51.383",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0ce1bc9e46ecabe84772bb561e373c0d9876d6f2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1012896f4225e8f801ff3c1648023845b66dfb11"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/14553be882d9ce91749c9d64041de66e34ad8e70"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/33a8b5e971e294ec2a7b74211c545e09efd8e9ac"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4a331582011d9e8089af8aa2a61ec6b4443bb245"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/683f7cfbf514193d63c0efa079f3352bde84c2e0"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/775b4dc9618a99a1fa48b57554041a5dc17e1336"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c7c0c0f4379dedec12d24dbb9dded5d2db7fd9f2"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-125"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-01T03:31:36+00:00",
      "cve": "CVE-2026-64102",
      "id": "CVE-2026-64102",
      "initial_release_date": "2026-07-19T00:00:00+00:00",
      "product_status:fixed": "453",
      "product_status:known_affected": "22",
      "product_status:known_not_affected": "119",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64102.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-01T00:46:02Z",
      "cve": "CVE-2026-64102",
      "id": "CVE-2026-64102",
      "initial_release_date": "2026-07-21T12:59:40Z",
      "product_status:known_affected": "626",
      "product_status:known_not_affected": "97",
      "product_status:recommended": "293",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64102",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64102.json",
      "version": "12"
    }
  }
}

RLSA-2026:72623 (CVE-2026-45942)

Vulnerability from osv_rocky – Published: 2026-09-30 12:05 – Updated: 2026-10-02 06:12 – Source website

Summary

Important: kernel security, bug fix, and enhancement update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: ext4: fix e4b bitmap inconsistency reports (CVE-2026-45942)
kernel: RDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE (CVE-2026-46325)
kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)
kernel: fhandle: fix UAF due to unlocked ->mnt_ns read in may_decode_fh() (CVE-2026-53341)
kernel: arm64: tlb: Flush walk cache when unsharing PMD tables (CVE-2026-63875)
kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math (CVE-2026-64102)
kernel: perf/core: Detach event groups during remove_on_exec (CVE-2026-64556)
kernel: crypto: tegra - fix rctx->cryptlen calculation in tegra_gcm_do_one_req() (CVE-2026-80522)
kernel: perf: Reject exited events as group leaders (CVE-2026-74753)

Bug Fix(es) and Enhancement(s):

KVM: s390: Limit adapter indicator access to mapped page [rhel-9.8.z] (JIRA:Rocky Linux-188656)
crypto: xxhash64 should not be fips approved [rhel-9.8.z] (JIRA:Rocky Linux-256437)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

7.8 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:72623	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2482104	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2487002	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2492364	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2495938	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2502318	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2502494	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2508319	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2524423	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2524434	REPORT
	https://access.redhat.com/errata/RHSA-2026:72623	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:9",
        "name": "kernel",
        "purl": "pkg:rpm/rocky-linux/kernel?distro=rocky-linux-9\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "BaseOS"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:5.14.0-687.53.1.el9_8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:72623"
  },
  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: ext4: fix e4b bitmap inconsistency reports (CVE-2026-45942)\n\n* kernel: RDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE (CVE-2026-46325)\n\n* kernel: crypto: af_alg - Cap AEAD AD length to 0x80000000 (CVE-2026-52972)\n\n* kernel: fhandle: fix UAF due to unlocked -\u003emnt_ns read in may_decode_fh() (CVE-2026-53341)\n\n* kernel: arm64: tlb: Flush walk cache when unsharing PMD tables (CVE-2026-63875)\n\n* kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math (CVE-2026-64102)\n\n* kernel: perf/core: Detach event groups during remove_on_exec (CVE-2026-64556)\n\n* kernel: crypto: tegra - fix rctx-\u003ecryptlen calculation in tegra_gcm_do_one_req() (CVE-2026-80522)\n\n* kernel: perf: Reject exited events as group leaders (CVE-2026-74753)\n\nBug Fix(es) and Enhancement(s):\n\n* KVM: s390: Limit adapter indicator access to mapped page [rhel-9.8.z] (JIRA:Rocky Linux-188656)\n\n* crypto: xxhash64 should not be fips approved [rhel-9.8.z] (JIRA:Rocky Linux-256437)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:72623",
  "modified": "2026-10-02T06:12:25.134753Z",
  "published": "2026-09-30T12:05:19.277561Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:72623"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482104"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2487002"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492364"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2495938"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502318"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502494"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2508319"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524423"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524434"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:72623"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Important: kernel security, bug fix, and enhancement update",
  "upstream": [
    "CVE-2026-45942",
    "CVE-2026-46325",
    "CVE-2026-52972",
    "CVE-2026-53341",
    "CVE-2026-63875",
    "CVE-2026-64102",
    "CVE-2026-64556",
    "CVE-2026-74753",
    "CVE-2026-80522"
  ]
}

RLSA-2026:74132 (CVE-2026-64102)

Vulnerability from osv_rocky – Published: 2026-10-01 18:02 – Updated: 2026-10-02 06:12 – Source website

Summary

Moderate: kernel-rt security, bug fix, and enhancement update

Details

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math (CVE-2026-64102)
kernel: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets (CVE-2026-68299)
kernel: net/liquidio: drop cached VF pci_dev LUT (CVE-2026-72329)
kernel: dm-integrity: don't increment hash_offset twice (CVE-2026-72099)

Bug Fix(es) and Enhancement(s):

[Rocky Linux 8.10] "kernel BUG at lib/list_debug.c:28!": list_add corruption in register_trace_event Rocky Linux 8.10 (JIRA:Rocky Linux-214136)
request_key_auth use-after-free on every request-key upcall since 4.18.0-553.165.1 (regression from CVE-2026-63823 backport) (JIRA:Rocky Linux-270349)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

7.3 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:74132	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2502494	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513356	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2516301	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2516445	REPORT
	https://access.redhat.com/errata/RHSA-2026:74132	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "kernel-rt",
        "purl": "pkg:rpm/rocky-linux/kernel-rt?distro=rocky-linux-8\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "NFV"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:4.18.0-553.170.1.rt7.511.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:74132"
  },
  "details": "The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.\n\nSecurity Fix(es):\n\n* kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math (CVE-2026-64102)\n\n* kernel: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets (CVE-2026-68299)\n\n* kernel: net/liquidio: drop cached VF pci_dev LUT (CVE-2026-72329)\n\n* kernel: dm-integrity: don\u0027t increment hash_offset twice (CVE-2026-72099)\n\nBug Fix(es) and Enhancement(s):\n\n* [Rocky Linux 8.10] \"kernel BUG at lib/list_debug.c:28!\": list_add corruption in register_trace_event Rocky Linux 8.10 (JIRA:Rocky Linux-214136)\n\n* request_key_auth use-after-free on every request-key upcall since 4.18.0-553.165.1 (regression from CVE-2026-63823 backport) (JIRA:Rocky Linux-270349)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:74132",
  "modified": "2026-10-02T06:12:22.363073Z",
  "published": "2026-10-01T18:02:02.341373Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:74132"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502494"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513356"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516301"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516445"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:74132"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Moderate: kernel-rt security, bug fix, and enhancement update",
  "upstream": [
    "CVE-2026-64102",
    "CVE-2026-68299",
    "CVE-2026-72099",
    "CVE-2026-72329"
  ]
}

RLSA-2026:74133 (CVE-2026-64102)

Vulnerability from osv_rocky – Published: 2026-10-01 18:00 – Updated: 2026-10-02 06:12 – Source website

Summary

Moderate: kernel security, bug fix, and enhancement update

Details

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math (CVE-2026-64102)
kernel: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets (CVE-2026-68299)
kernel: net/liquidio: drop cached VF pci_dev LUT (CVE-2026-72329)
kernel: dm-integrity: don't increment hash_offset twice (CVE-2026-72099)

Bug Fix(es) and Enhancement(s):

[Rocky Linux 8.10] "kernel BUG at lib/list_debug.c:28!": list_add corruption in register_trace_event Rocky Linux 8.10 (JIRA:Rocky Linux-214136)
request_key_auth use-after-free on every request-key upcall since 4.18.0-553.165.1 (regression from CVE-2026-63823 backport) (JIRA:Rocky Linux-270349)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Severity

7.3 (High)


                    
                      CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H

Credits

Rocky Enterprise Software Foundation

Red Hat

References

URL

Type

	https://errata.rockylinux.org/RLSA-2026:74133	ADVISORY
	https://bugzilla.redhat.com/show_bug.cgi?id=2502494	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2513356	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2516301	REPORT
	https://bugzilla.redhat.com/show_bug.cgi?id=2516445	REPORT
	https://access.redhat.com/errata/RHSA-2026:74133	ADVISORY

JSON

To clipboard

{
  "affected": [
    {
      "package": {
        "ecosystem": "Rocky Linux:8",
        "name": "kernel",
        "purl": "pkg:rpm/rocky-linux/kernel?distro=rocky-linux-8\u0026epoch=0"
      },
      "ranges": [
        {
          "database_specific": {
            "yum_repository": "BaseOS"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0:4.18.0-553.170.1.el8_10"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "credits": [
    {
      "name": "Rocky Enterprise Software Foundation"
    },
    {
      "name": "Red Hat"
    }
  ],
  "database_specific": {
    "license": "CC-BY-4.0",
    "license_url": "https://creativecommons.org/licenses/by/4.0/",
    "source_advisory": "RHSA-2026:74133"
  },
  "details": "The kernel packages contain the Linux kernel, the core of any Linux operating system.\n\nSecurity Fix(es):\n\n* kernel: RDMA/siw: Reject MPA FPDU length underflow before signed receive math (CVE-2026-64102)\n\n* kernel: vmxnet3: fix BUG_ON in vmxnet3_get_hdr_len() for Geneve packets (CVE-2026-68299)\n\n* kernel: net/liquidio: drop cached VF pci_dev LUT (CVE-2026-72329)\n\n* kernel: dm-integrity: don\u0027t increment hash_offset twice (CVE-2026-72099)\n\nBug Fix(es) and Enhancement(s):\n\n* [Rocky Linux 8.10] \"kernel BUG at lib/list_debug.c:28!\": list_add corruption in register_trace_event Rocky Linux 8.10 (JIRA:Rocky Linux-214136)\n\n* request_key_auth use-after-free on every request-key upcall since 4.18.0-553.165.1 (regression from CVE-2026-63823 backport) (JIRA:Rocky Linux-270349)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.",
  "id": "RLSA-2026:74133",
  "modified": "2026-10-02T06:12:16.070081Z",
  "published": "2026-10-01T18:00:58.911304Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://errata.rockylinux.org/RLSA-2026:74133"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502494"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2513356"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516301"
    },
    {
      "type": "REPORT",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516445"
    },
    {
      "type": "ADVISORY",
      "url": "https://access.redhat.com/errata/RHSA-2026:74133"
    }
  ],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Moderate: kernel security, bug fix, and enhancement update",
  "upstream": [
    "CVE-2026-64102",
    "CVE-2026-68299",
    "CVE-2026-72099",
    "CVE-2026-72329"
  ]
}

SUSE-SU-2026:23477-1

Vulnerability from csaf_suse - Published: 2026-09-08 12:54 - Updated: 2026-10-02 10:44

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-64102.

CVE-2026-64102

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Recommended: 4 products

Open the full advisory

SUSE-SU-2026:23481-1

Vulnerability from csaf_suse - Published: 2026-09-08 13:00 - Updated: 2026-10-02 10:44

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-64102.

CVE-2026-64102

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Recommended: 11 products

Open the full advisory

SUSE-SU-2026:23528-1

Vulnerability from csaf_suse - Published: 2026-09-08 10:34 - Updated: 2026-10-02 10:44

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-64102.

CVE-2026-64102

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Recommended: 7 products

Open the full advisory

SUSE-SU-2026:23529-1

Vulnerability from csaf_suse - Published: 2026-09-08 11:00 - Updated: 2026-10-02 10:44

Summary

Security update for the Linux Kernel

Severity

Important

Scope

588 vulnerabilities in this advisory, including CVE-2026-64102.

CVE-2026-64102

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Recommended: 17 products

Open the full advisory

SUSE-SU-2026:23881-1

Vulnerability from csaf_suse - Published: 2026-09-22 13:18 - Updated: 2026-10-02 10:44

Summary

Security update for the Linux Kernel

Severity

Important

Scope

885 vulnerabilities in this advisory, including CVE-2026-64102.

CVE-2026-64102

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Recommended: 8 products

Open the full advisory

SUSE-SU-2026:23887-1

Vulnerability from csaf_suse - Published: 2026-09-22 14:23 - Updated: 2026-10-02 10:44

Summary

Security update for the Linux Kernel

Severity

Important

Scope

885 vulnerabilities in this advisory, including CVE-2026-64102.

CVE-2026-64102

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Recommended: 28 products

Open the full advisory

SUSE-SU-2026:23897-1

Vulnerability from csaf_suse - Published: 2026-09-22 13:58 - Updated: 2026-10-02 10:44

Summary

Security update for the Linux Kernel

Severity

Important

Scope

885 vulnerabilities in this advisory, including CVE-2026-64102.

CVE-2026-64102

6.5 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Recommended: 9 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-64102 (GCVE-0-2026-64102)

RLSA-2026:72623 (CVE-2026-45942)

RLSA-2026:74132 (CVE-2026-64102)

RLSA-2026:74133 (CVE-2026-64102)

SUSE-SU-2026:23477-1

SUSE-SU-2026:23481-1

SUSE-SU-2026:23528-1

SUSE-SU-2026:23529-1

SUSE-SU-2026:23881-1

SUSE-SU-2026:23887-1

SUSE-SU-2026:23897-1

Tags

Sightings

Nomenclature

Related by attack behaviour