CVE-2026-46331

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.
References
Link Resource
https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b Patch
https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512 Patch
https://git.kernel.org/stable/c/544d857b42a1734b923040e13aa61a6fd4746cf2 Patch
https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a Patch
https://git.kernel.org/stable/c/a071e057518decc5e3bec89855758f5f8786f2c5 Patch
https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313 Patch
https://git.kernel.org/stable/c/b685d6ef6f07a3b5ce814565a25f39f2157538a5 Patch
https://git.kernel.org/stable/c/d5d01d35a5a7d36f7cb679b67d9cbdd5205672dc Patch
https://access.redhat.com/errata/RHSA-2026:27288 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27353 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27354 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27355 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27704 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27705 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27706 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27707 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27708 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27709 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27713 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27731 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:27789 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:28887 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:28962 Issue Tracking
https://access.redhat.com/errata/RHSA-2026:29080 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:29794 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:29799 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:29833 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:29856 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:29863 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33219 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33220 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33221 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33222 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33223 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33224 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33225 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:33666 Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:34048
https://access.redhat.com/errata/RHSA-2026:34098
https://access.redhat.com/errata/RHSA-2026:40021
https://access.redhat.com/security/cve/CVE-2026-46331 Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2479492 Third Party Advisory
https://github.com/sgkdev/packet_edit_meme/tree/main Third Party Advisory
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46331.json Third Party Advisory
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-16 08:16

Updated : 2026-09-02 13:17


NVD link : CVE-2026-46331

Mitre link : CVE-2026-46331

CVE.ORG link : CVE-2026-46331


JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-190

Integer Overflow or Wraparound

CWE-787

Out-of-bounds Write