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CVE-2026-89482 (GCVE-0-2026-89482)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00
VLAI
Title
nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone
Summary
In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone Commit 25e5cb780e62 ("nvme-tcp: fix possible crash in write_zeroes processing") established that blk_rq_payload_bytes() must not be read without first checking blk_rq_nr_phys_segments(), and recorded the result in nvme_tcp_setup_cmd_pdu() as req->data_len. The receive side was left as it was. The two differ for REQ_OP_WRITE_ZEROES, which has no physical segments but a non-zero blk_rq_bytes(), so setup leaves req->iter untouched while the receive gate lets a C2HData through and nvme_tcp_recv_data() copies into whatever the previous command on that tag left there. The driver-private area is zeroed only when the tag set is allocated. Reproduced with a test target that leaves a residual iterator on a tag and then sends a C2HData for a WRITE_ZEROES command on the same tag: BUG: KASAN: wild-memory-access in _copy_to_iter+0x642/0x1330 Write of size 512 at addr ffe728c2175dfa81 by task kworker/0:1H/103 CPU: 0 UID: 0 PID: 103 Comm: kworker/0:1H Not tainted 7.2.0-rc5-NVMETCP-gf5098b6bae76 #1 PREEMPT(lazy) Hardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: nvme_tcp_wq nvme_tcp_io_work Call Trace: <TASK> dump_stack_lvl+0x53/0x70 kasan_report+0xce/0x100 ? _copy_to_iter+0x642/0x1330 kasan_check_range+0x105/0x1b0 __asan_memcpy+0x3c/0x60 _copy_to_iter+0x642/0x1330 ? __pfx_sock_has_perm+0x10/0x10 ? worker_thread+0x45b/0xd10 ? __pfx__copy_to_iter+0x10/0x10 ? _raw_spin_lock_bh+0x83/0xe0 ? __pfx__raw_spin_lock_bh+0x10/0x10 __skb_datagram_iter+0xf3/0x820 ? __pfx_simple_copy_to_iter+0x10/0x10 ? __asan_memcpy+0x3c/0x60 ? skb_copy_bits+0x58d/0x830 skb_copy_datagram_iter+0x37/0x120 nvme_tcp_recv_skb+0xa07/0x4320 ? __pfx_nvme_tcp_recv_skb+0x10/0x10 __tcp_read_sock+0x1ab/0x810 ? __pfx_nvme_tcp_recv_skb+0x10/0x10 ? __pfx_lock_sock_nested+0x10/0x10 ? __pfx___tcp_read_sock+0x10/0x10 nvme_tcp_try_recv+0x152/0x1e0 ? __pfx_nvme_tcp_try_recv+0x10/0x10 ? __pfx_mutex_unlock+0x10/0x10 nvme_tcp_io_work+0x1e4/0x6c0 ? __schedule+0x181a/0x49f0 ? __pfx_nvme_tcp_io_work+0x10/0x10 process_one_work+0x633/0x1030 Keep the blk_rq_payload_bytes() test and add req->data_len to it. The old test is what rejects a C2HData naming a tag that is no longer in flight, because blk_update_request() zeroes rq->__data_len on completion; req->data_len and req->curr_bio are driver-private and survive completion, so they cannot stand in for it. Setup initialises the iterator only when both req->curr_bio and req->data_len are set, so the gate now tests the same two.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < 32ea8ce96b9bd797c59c351ce490ffd97adaa8c0 (git)
Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab (git)
Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < 7ed0b61bbc145988be292c4d3ec580aebd8d2bcd (git)
Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528 (git)
Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < b36161701cb366f416afdcf70771d432a7c74753 (git)
Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < 6a01b58263108eaf9869bb6f82f07709240c6589 (git)
Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < 641ad3a30ba560f0a9a610376c568d7b75d2a2aa (git)
Affected: 25e5cb780e62bde432b401f312bb847edc78b432 , < 3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36 (git)
Affected: f507ae6e33cbe56c4e3fe000434fc0ecc263d098 (git)
Affected: b1458c16f4e26e87492e58e4d24a1873bd09232a (git)
Affected: 5.4.36 , < 5.5 (semver)
Affected: 5.6.8 , < 5.7 (semver)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.270 , ≤ 5.10.* (semver)
Unaffected: 5.15.221 , ≤ 5.15.* (semver)
Unaffected: 6.1.188 , ≤ 6.1.* (semver)
Unaffected: 6.6.157 , ≤ 6.6.* (semver)
Unaffected: 6.12.109 , ≤ 6.12.* (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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                  "versionStartIncluding": "5.7",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone\n\nCommit 25e5cb780e62 (\"nvme-tcp: fix possible crash in write_zeroes\nprocessing\") established that blk_rq_payload_bytes() must not be read\nwithout first checking blk_rq_nr_phys_segments(), and recorded the\nresult in nvme_tcp_setup_cmd_pdu() as req-\u003edata_len. The receive side\nwas left as it was.\n\nThe two differ for REQ_OP_WRITE_ZEROES, which has no physical segments\nbut a non-zero blk_rq_bytes(), so setup leaves req-\u003eiter untouched\nwhile the receive gate lets a C2HData through and nvme_tcp_recv_data()\ncopies into whatever the previous command on that tag left there. The\ndriver-private area is zeroed only when the tag set is allocated.\n\nReproduced with a test target that leaves a residual iterator on a tag\nand then sends a C2HData for a WRITE_ZEROES command on the same tag:\n\nBUG: KASAN: wild-memory-access in _copy_to_iter+0x642/0x1330\nWrite of size 512 at addr ffe728c2175dfa81 by task kworker/0:1H/103\n\nCPU: 0 UID: 0 PID: 103 Comm: kworker/0:1H Not tainted 7.2.0-rc5-NVMETCP-gf5098b6bae76 #1 PREEMPT(lazy)\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\nWorkqueue: nvme_tcp_wq nvme_tcp_io_work\nCall Trace:\n \u003cTASK\u003e\n dump_stack_lvl+0x53/0x70\n kasan_report+0xce/0x100\n ? _copy_to_iter+0x642/0x1330\n kasan_check_range+0x105/0x1b0\n __asan_memcpy+0x3c/0x60\n _copy_to_iter+0x642/0x1330\n ? __pfx_sock_has_perm+0x10/0x10\n ? worker_thread+0x45b/0xd10\n ? __pfx__copy_to_iter+0x10/0x10\n ? _raw_spin_lock_bh+0x83/0xe0\n ? __pfx__raw_spin_lock_bh+0x10/0x10\n __skb_datagram_iter+0xf3/0x820\n ? __pfx_simple_copy_to_iter+0x10/0x10\n ? __asan_memcpy+0x3c/0x60\n ? skb_copy_bits+0x58d/0x830\n skb_copy_datagram_iter+0x37/0x120\n nvme_tcp_recv_skb+0xa07/0x4320\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n __tcp_read_sock+0x1ab/0x810\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\n ? __pfx_lock_sock_nested+0x10/0x10\n ? __pfx___tcp_read_sock+0x10/0x10\n nvme_tcp_try_recv+0x152/0x1e0\n ? __pfx_nvme_tcp_try_recv+0x10/0x10\n ? __pfx_mutex_unlock+0x10/0x10\n nvme_tcp_io_work+0x1e4/0x6c0\n ? __schedule+0x181a/0x49f0\n ? __pfx_nvme_tcp_io_work+0x10/0x10\n process_one_work+0x633/0x1030\n\nKeep the blk_rq_payload_bytes() test and add req-\u003edata_len to it. The\nold test is what rejects a C2HData naming a tag that is no longer in\nflight, because blk_update_request() zeroes rq-\u003e__data_len on\ncompletion; req-\u003edata_len and req-\u003ecurr_bio are driver-private and\nsurvive completion, so they cannot stand in for it. Setup initialises\nthe iterator only when both req-\u003ecurr_bio and req-\u003edata_len are set, so\nthe gate now tests the same two."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "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"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The nvme-tcp host receive path parses C2HData PDUs from a remote NVMe/TCP target over a routable TCP connection (typically port 4420); a malicious or compromised target, or an on-path attacker injecting into the stream, triggers the bug from the network.\nAC:L - A malicious target can advertise WRITE_ZEROES, wait for tag reuse after a data command, and send C2HData for that in-flight WRITE_ZEROES; leftover iterator state is deterministic because driver-private fields are not cleared on reuse, so no race or memory-layout luck is required.\nPR:N - NVMe/TCP authentication (TLS, DH-HMAC-CHAP) is optional and off by default; the vulnerable copy runs on C2HData from the connected peer, which needs no credentials or privileges on the victim host.\nUI:N - Once the host is connected to the target as persistent storage, ordinary filesystem and block I/O generate WRITE_ZEROES commands; the attacker sends the crafted PDU without any further victim action.\nS:U - The stale-iterator write corrupts memory in the same host kernel security authority; this is not a VM, IOMMU, or sandbox boundary crossing.\nC:H - nvme_tcp_recv_data() writes attacker-controlled C2HData through a leftover iov_iter into pages from a previously completed command on the same tag, a use-after-free of those buffers that can be turned into an arbitrary read via heap reuse.\nI:H - The copy is a use-after-free / wild write of attacker-chosen contents and length into reused kernel or page-cache memory, which is exploitable for arbitrary write and control-flow hijacking.\nA:H - The same stale-iterator write was reproduced as a KASAN wild-memory-access in _copy_to_iter from nvme_tcp_io_work and can oops or panic the host kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:19.222Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/32ea8ce96b9bd797c59c351ce490ffd97adaa8c0"
        },
        {
          "url": "https://git.kernel.org/stable/c/dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab"
        },
        {
          "url": "https://git.kernel.org/stable/c/7ed0b61bbc145988be292c4d3ec580aebd8d2bcd"
        },
        {
          "url": "https://git.kernel.org/stable/c/b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528"
        },
        {
          "url": "https://git.kernel.org/stable/c/b36161701cb366f416afdcf70771d432a7c74753"
        },
        {
          "url": "https://git.kernel.org/stable/c/6a01b58263108eaf9869bb6f82f07709240c6589"
        },
        {
          "url": "https://git.kernel.org/stable/c/641ad3a30ba560f0a9a610376c568d7b75d2a2aa"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36"
        }
      ],
      "title": "nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89482",
    "datePublished": "2026-09-11T19:43:37.236Z",
    "dateReserved": "2026-09-11T19:38:34.712Z",
    "dateUpdated": "2026-09-14T12:00:19.222Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-89482",
      "date": "2026-09-15",
      "epss": "0.00704",
      "percentile": "0.51422"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-14T14:51:12.000Z",
      "cve": "CVE-2026-89482",
      "id": "msrc_CVE-2026-89482",
      "initial_release_date": "2026-09-13T01:04:57.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-89482.json",
      "version": "2"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-89482\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-09-11T20:19:29.730\",\"lastModified\":\"2026-09-14T13:19:04.920\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone\\n\\nCommit 25e5cb780e62 (\\\"nvme-tcp: fix possible crash in write_zeroes\\nprocessing\\\") established that blk_rq_payload_bytes() must not be read\\nwithout first checking blk_rq_nr_phys_segments(), and recorded the\\nresult in nvme_tcp_setup_cmd_pdu() as req-\u003edata_len. The receive side\\nwas left as it was.\\n\\nThe two differ for REQ_OP_WRITE_ZEROES, which has no physical segments\\nbut a non-zero blk_rq_bytes(), so setup leaves req-\u003eiter untouched\\nwhile the receive gate lets a C2HData through and nvme_tcp_recv_data()\\ncopies into whatever the previous command on that tag left there. The\\ndriver-private area is zeroed only when the tag set is allocated.\\n\\nReproduced with a test target that leaves a residual iterator on a tag\\nand then sends a C2HData for a WRITE_ZEROES command on the same tag:\\n\\nBUG: KASAN: wild-memory-access in _copy_to_iter+0x642/0x1330\\nWrite of size 512 at addr ffe728c2175dfa81 by task kworker/0:1H/103\\n\\nCPU: 0 UID: 0 PID: 103 Comm: kworker/0:1H Not tainted 7.2.0-rc5-NVMETCP-gf5098b6bae76 #1 PREEMPT(lazy)\\nHardware name: QEMU Ubuntu 24.04 PC v2 (i440FX + PIIX, arch_caps fix, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014\\nWorkqueue: nvme_tcp_wq nvme_tcp_io_work\\nCall Trace:\\n \u003cTASK\u003e\\n dump_stack_lvl+0x53/0x70\\n kasan_report+0xce/0x100\\n ? _copy_to_iter+0x642/0x1330\\n kasan_check_range+0x105/0x1b0\\n __asan_memcpy+0x3c/0x60\\n _copy_to_iter+0x642/0x1330\\n ? __pfx_sock_has_perm+0x10/0x10\\n ? worker_thread+0x45b/0xd10\\n ? __pfx__copy_to_iter+0x10/0x10\\n ? _raw_spin_lock_bh+0x83/0xe0\\n ? __pfx__raw_spin_lock_bh+0x10/0x10\\n __skb_datagram_iter+0xf3/0x820\\n ? __pfx_simple_copy_to_iter+0x10/0x10\\n ? __asan_memcpy+0x3c/0x60\\n ? skb_copy_bits+0x58d/0x830\\n skb_copy_datagram_iter+0x37/0x120\\n nvme_tcp_recv_skb+0xa07/0x4320\\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\\n __tcp_read_sock+0x1ab/0x810\\n ? __pfx_nvme_tcp_recv_skb+0x10/0x10\\n ? __pfx_lock_sock_nested+0x10/0x10\\n ? __pfx___tcp_read_sock+0x10/0x10\\n nvme_tcp_try_recv+0x152/0x1e0\\n ? __pfx_nvme_tcp_try_recv+0x10/0x10\\n ? __pfx_mutex_unlock+0x10/0x10\\n nvme_tcp_io_work+0x1e4/0x6c0\\n ? __schedule+0x181a/0x49f0\\n ? __pfx_nvme_tcp_io_work+0x10/0x10\\n process_one_work+0x633/0x1030\\n\\nKeep the blk_rq_payload_bytes() test and add req-\u003edata_len to it. The\\nold test is what rejects a C2HData naming a tag that is no longer in\\nflight, because blk_update_request() zeroes rq-\u003e__data_len on\\ncompletion; req-\u003edata_len and req-\u003ecurr_bio are driver-private and\\nsurvive completion, so they cannot stand in for it. Setup initialises\\nthe iterator only when both req-\u003ecurr_bio and req-\u003edata_len are set, so\\nthe gate now tests the same two.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/nvme/host/tcp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"32ea8ce96b9bd797c59c351ce490ffd97adaa8c0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"7ed0b61bbc145988be292c4d3ec580aebd8d2bcd\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"b36161701cb366f416afdcf70771d432a7c74753\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"6a01b58263108eaf9869bb6f82f07709240c6589\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"641ad3a30ba560f0a9a610376c568d7b75d2a2aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"25e5cb780e62bde432b401f312bb847edc78b432\",\"lessThan\":\"3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f507ae6e33cbe56c4e3fe000434fc0ecc263d098\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b1458c16f4e26e87492e58e4d24a1873bd09232a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.4.36\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.6.8\",\"lessThan\":\"5.7\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/nvme/host/tcp.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.7\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.7\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.270\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.221\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.188\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.157\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.109\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.50\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2.4\",\"lessThanOrEqual\":\"7.2.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.3-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/32ea8ce96b9bd797c59c351ce490ffd97adaa8c0\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3a4aa9e6ad3e35f8e24d5eaf38ee4d437075fb36\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/641ad3a30ba560f0a9a610376c568d7b75d2a2aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6a01b58263108eaf9869bb6f82f07709240c6589\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7ed0b61bbc145988be292c4d3ec580aebd8d2bcd\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b36161701cb366f416afdcf70771d432a7c74753\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b96e1ff75e5c0ad6e077ac002b1d30b0a2b49528\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/dd8906bb8f8d5bf1c9f861e1382c82b87bfe7cab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-15T17:58:49+00:00",
      "cve": "CVE-2026-89482",
      "id": "CVE-2026-89482",
      "initial_release_date": "2026-09-11T00:00:00+00:00",
      "product_status:known_affected": "234",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: nvme-tcp: do not accept C2HData based on blk_rq_payload_bytes() alone",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89482.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


Detection rules are retrieved from Rulezet.