CVE-2026-46331 (GCVE-0-2026-46331)

Vulnerability from cvelistv5 – Published: 2026-06-16 06:26 – Updated: 2026-06-19 12:00
VLAI
Title
net/sched: fix pedit partial COW leading to page cache corruption
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: fix pedit partial COW leading to page cache corruption tcf_pedit_act() computes the COW range for skb_ensure_writable() once before the key loop using tcfp_off_max_hint, but the hint does not account for the runtime header offset added by typed keys. This can leave part of the write region un-COW'd. Fix by moving skb_ensure_writable() inside the per-key loop where the actual write offset is known, and add overflow checking on the offset arithmetic. For negative offsets (e.g. Ethernet header edits at ingress), use skb_cow() to COW the headroom instead. Guard offset_valid() against INT_MIN, where negation is undefined.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < 2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b (git)
Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < b198ed4e52580a7238c7c7082f03906f8b310313 (git)
Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < 3dee9d0c198faeb95d052c1b94c2958751a28512 (git)
Affected: 8b796475fd7882663a870456466a4fb315cc1bd6 , < 899ee91156e57784090c5565e4f31bd7dbffbc5a (git)
Affected: d0c38a914b0c4c21d553da801003d36979016726 (git)
Affected: 2ec2dd7d51a9320151f275ddbb2b53260fb32ca1 (git)
Affected: abe35bf3be51482593076d516a680d79e5fbc8e1 (git)
Affected: b773640d5bb9e2acfd91e2695717af04d47aa116 (git)
Affected: c19cc520b3d69904e9518d401ad0df7f4702aca0 (git)
Affected: 4.19.244 , < 4.20 (semver)
Affected: 5.4.195 , < 5.5 (semver)
Affected: 5.10.117 , < 5.11 (semver)
Affected: 5.15.41 , < 5.16 (semver)
Affected: 5.17.9 , < 5.18 (semver)
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Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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{
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          "programFiles": [
            "include/net/tc_act/tc_pedit.h",
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: fix pedit partial COW leading to page cache corruption\n\ntcf_pedit_act() computes the COW range for skb_ensure_writable()\nonce before the key loop using tcfp_off_max_hint, but the hint does\nnot account for the runtime header offset added by typed keys. This\ncan leave part of the write region un-COW\u0027d.\n\nFix by moving skb_ensure_writable() inside the per-key loop where\nthe actual write offset is known, and add overflow checking on the\noffset arithmetic. For negative offsets (e.g. Ethernet header edits\nat ingress), use skb_cow() to COW the headroom instead. Guard\noffset_valid() against INT_MIN, where negation is undefined."
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        "dateUpdated": "2026-06-19T12:00:28.128Z",
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    "datePublished": "2026-06-16T06:26:21.066Z",
    "dateReserved": "2026-05-13T15:03:33.112Z",
    "dateUpdated": "2026-06-19T12:00:28.128Z",
    "state": "PUBLISHED"
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}


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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.

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Nomenclature

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