CVE-2026-46331 (GCVE-0-2026-46331)
Vulnerability from cvelistv5 – Published: 2026-06-16 06:26 – Updated: 2026-07-03 12:05
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 ?
7.8 (High)
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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"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Sightings
| Author | Source | Type | Date |
|---|
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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