Vigie VulnDBEuropean-hosted Vulnerability DB
FR
Menu

CVE-2026-46331

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

HIGH 7.8

At a glance

Source
NVD
EPSS
EPSS 0.64 % · percentile 50 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

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.

Weaknesses (CWE)

  • CWE-787 — Out-of-bounds Write
  • CWE-190 — Integer Overflow or Wraparound

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux
CVSS 3.1MEDIUM 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:Hredhat-SADP
CVSS 3.1HIGH 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 6.7CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HNVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected abe35bf3be51482593076d516a680d79e5fbc8e1 < 544d857b42a1734b923040e13aa61a6fd4746cf2 ; affected b773640d5bb9e2acfd91e2695717af04d47aa116 < d5d01d35a5a7d36f7cb679b67d9cbdd5205672dc ; affected 8b796475fd7882663a870456466a4fb315cc1bd6 < a071e057518decc5e3bec89855758f5f8786f2c5 ; affected 8b796475fd7882663a870456466a4fb315cc1bd6 < b685d6ef6f07a3b5ce814565a25f39f2157538a5 ; affected 8b796475fd7882663a870456466a4fb315cc1bd6 < 2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b ; affected 8b796475fd7882663a870456466a4fb315cc1bd6 < b198ed4e52580a7238c7c7082f03906f8b310313
Linux · Linuxaffected 5.18 ; unaffected 0 < 5.18 ; unaffected 5.10.260 ≤ 5.10.* ; unaffected 5.15.211 ≤ 5.15.* ; unaffected 6.1.177 ≤ 6.1.* ; unaffected 6.6.144 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD