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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-46331

net/sched: fix pedit partial COW leading to page cache corruption

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Status
Published
Published
Updated
Assigning organization
Linux

Description

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.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • abe35bf3be51482593076d516a680d79e5fbc8e1 to < 544d857b42a1734b923040e13aa61a6fd4746cf2affected
  • b773640d5bb9e2acfd91e2695717af04d47aa116 to < d5d01d35a5a7d36f7cb679b67d9cbdd5205672dcaffected
  • 8b796475fd7882663a870456466a4fb315cc1bd6 to < a071e057518decc5e3bec89855758f5f8786f2c5affected
  • 8b796475fd7882663a870456466a4fb315cc1bd6 to < b685d6ef6f07a3b5ce814565a25f39f2157538a5affected
  • 8b796475fd7882663a870456466a4fb315cc1bd6 to < 2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61baffected
  • 8b796475fd7882663a870456466a4fb315cc1bd6 to < b198ed4e52580a7238c7c7082f03906f8b310313affected
  • 8b796475fd7882663a870456466a4fb315cc1bd6 to < 3dee9d0c198faeb95d052c1b94c2958751a28512affected
  • 8b796475fd7882663a870456466a4fb315cc1bd6 to < 899ee91156e57784090c5565e4f31bd7dbffbc5aaffected
  • d0c38a914b0c4c21d553da801003d36979016726affected
  • 2ec2dd7d51a9320151f275ddbb2b53260fb32ca1affected
  • c19cc520b3d69904e9518d401ad0df7f4702aca0affected
  • 5.10.117 to < 5.10.260affected
  • 5.15.41 to < 5.15.211affected
  • 4.19.244 to < 4.20affected
  • 5.4.195 to < 5.5affected
  • 5.17.9 to < 5.18affected

Linux Linux

Default version status: affected

  • 5.18affected
  • 0 to < 5.18unaffected
  • 5.10.260 to ≤ 5.10.*unaffected
  • 5.15.211 to ≤ 5.15.*unaffected
  • 6.1.177 to ≤ 6.1.*unaffected
  • 6.6.144 to ≤ 6.6.*unaffected
  • 6.12.94 to ≤ 6.12.*unaffected
  • 6.18.36 to ≤ 6.18.*unaffected
  • 7.0.13 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References