CVE-2026-64548 (GCVE-0-2026-64548)

Vulnerability from cvelistv5 – Published: 2026-07-27 20:10 – Updated: 2026-07-27 20:10
VLAI
Title
bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data() When the scatterlist ring is full or nearly full, bpf_msg_push_data() enters a copy fallback path and computes copy + len for the page allocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING and both are u32, a crafted len can wrap the sum to a small value, causing an undersized allocation followed by an out-of-bounds memcpy. BUG: unable to handle page fault for address: ffffed104089a402 Oops: Oops: 0000 [#1] SMP KASAN NOPTI Call Trace: __asan_memcpy (mm/kasan/shadow.c:105) bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788) bpf_prog_9ed8b5711920a7d7+0x2e/0x36 sk_psock_msg_verdict (net/core/skmsg.c:934) tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584) __sys_sendto (net/socket.c:2206) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Add an overflow check before the allocation.
Severity
No CVSS data available.
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5 (git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < a12b1575f9feabd91695a9e9d004862f7195fa25 (git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d (git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 888706a76286c547bd035432602571e8024b5305 (git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < db77b6bb6e6edb79b10b4efcce346eec5582d588 (git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 4e40056bb5c829f0423f0a6694a0477726d2147e (git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < bd004716ba75fed6d185795c85cdc92540ebeaab (git)
Affected: 6fff607e2f14bd7c63c06c464a6f93b8efbabe28 , < 0c0a8ed85349dae298712d79cb276acfeb794d82 (git)
Create a notification for this product.
Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)
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Show details on NVD website

{
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          "product": "Linux",
          "programFiles": [
            "net/core/filter.c"
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          "product": "Linux",
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.20"
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              "status": "unaffected",
              "version": "0",
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              "versionType": "semver"
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            {
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              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
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              "negate": false,
              "operator": "OR"
            }
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()\n\nWhen the scatterlist ring is full or nearly full, bpf_msg_push_data()\nenters a copy fallback path and computes copy + len for the page\nallocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING\nand both are u32, a crafted len can wrap the sum to a small value,\ncausing an undersized allocation followed by an out-of-bounds memcpy.\n\n BUG: unable to handle page fault for address: ffffed104089a402\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n Call Trace:\n  __asan_memcpy (mm/kasan/shadow.c:105)\n  bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788)\n  bpf_prog_9ed8b5711920a7d7+0x2e/0x36\n  sk_psock_msg_verdict (net/core/skmsg.c:934)\n  tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584)\n  __sys_sendto (net/socket.c:2206)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\nAdd an overflow check before the allocation."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-27T20:10:38.355Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/a12b1575f9feabd91695a9e9d004862f7195fa25"
        },
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          "url": "https://git.kernel.org/stable/c/ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d"
        },
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          "url": "https://git.kernel.org/stable/c/888706a76286c547bd035432602571e8024b5305"
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          "url": "https://git.kernel.org/stable/c/db77b6bb6e6edb79b10b4efcce346eec5582d588"
        },
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          "url": "https://git.kernel.org/stable/c/4e40056bb5c829f0423f0a6694a0477726d2147e"
        },
        {
          "url": "https://git.kernel.org/stable/c/bd004716ba75fed6d185795c85cdc92540ebeaab"
        },
        {
          "url": "https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82"
        }
      ],
      "title": "bpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()",
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        "engine": "bippy-1.2.0"
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  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64548",
    "datePublished": "2026-07-27T20:10:38.355Z",
    "dateReserved": "2026-07-19T15:36:31.795Z",
    "dateUpdated": "2026-07-27T20:10:38.355Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-64548\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-07-27T21:17:07.570\",\"lastModified\":\"2026-07-27T21:17:07.570\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf, sockmap: reject overflowing copy + len in bpf_msg_push_data()\\n\\nWhen the scatterlist ring is full or nearly full, bpf_msg_push_data()\\nenters a copy fallback path and computes copy + len for the page\\nallocation size. Since len comes from BPF with arg3_type = ARG_ANYTHING\\nand both are u32, a crafted len can wrap the sum to a small value,\\ncausing an undersized allocation followed by an out-of-bounds memcpy.\\n\\n BUG: unable to handle page fault for address: ffffed104089a402\\n Oops: Oops: 0000 [#1] SMP KASAN NOPTI\\n Call Trace:\\n  __asan_memcpy (mm/kasan/shadow.c:105)\\n  bpf_msg_push_data (net/core/filter.c:2852 net/core/filter.c:2788)\\n  bpf_prog_9ed8b5711920a7d7+0x2e/0x36\\n  sk_psock_msg_verdict (net/core/skmsg.c:934)\\n  tcp_bpf_sendmsg (net/ipv4/tcp_bpf.c:421 net/ipv4/tcp_bpf.c:584)\\n  __sys_sendto (net/socket.c:2206)\\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\\n\\nAdd an overflow check before the allocation.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/core/filter.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"a12b1575f9feabd91695a9e9d004862f7195fa25\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"888706a76286c547bd035432602571e8024b5305\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"db77b6bb6e6edb79b10b4efcce346eec5582d588\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"4e40056bb5c829f0423f0a6694a0477726d2147e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"bd004716ba75fed6d185795c85cdc92540ebeaab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6fff607e2f14bd7c63c06c464a6f93b8efbabe28\",\"lessThan\":\"0c0a8ed85349dae298712d79cb276acfeb794d82\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/core/filter.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.20\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4e40056bb5c829f0423f0a6694a0477726d2147e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/888706a76286c547bd035432602571e8024b5305\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a12b1575f9feabd91695a9e9d004862f7195fa25\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/bd004716ba75fed6d185795c85cdc92540ebeaab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/db77b6bb6e6edb79b10b4efcce346eec5582d588\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}



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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.

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