CVE-2026-46331 Affecting kernel-zfcpdump-devel-matched package, versions <0:5.14.0-687.17.1.el9_8


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.23% (14th percentile)

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  • Snyk IDSNYK-ALMALINUX9-KERNELZFCPDUMPDEVELMATCHED-17436212
  • published24 Jun 2026
  • disclosed19 Jun 2026

Introduced: 19 Jun 2026

NewCVE-2026-46331  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:9 kernel-zfcpdump-devel-matched to version 0:5.14.0-687.17.1.el9_8 or higher.
This issue was patched in ALSA-2026:27789.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-zfcpdump-devel-matched package and not the kernel-zfcpdump-devel-matched package as distributed by AlmaLinux. See How to fix? for AlmaLinux:9 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1