CVE-2026-46331

As of 2026-06-19, CVE-2026-46331 is a vulnerability. Public exploit code available. EPSS exploitation probability 0.3%. Threadlinqs Intelligence tracks 2 threats exploiting it.

Last updated: 2026-06-19

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.

Exploitation status

public exploit code available

• sgkdev/packet_edit_meme (github)
• 0xBlackash/CVE-2026-46331 (github)
• HORKimhab/CVE-2026-46331 (github)

Threats tracking this CVE

• Linux Kernel act_pedit COW Out-of-Bounds Write Enables Local Privilege Escalation to Root (CVE-2026-46331) — HIGH
• Linux Kernel act_pedit Partial Copy-on-Write Page-Cache Corruption Local Privilege Escalation (CVE-2026-46331, "pedit COW") — HIGH

References

• https://git.kernel.org/stable/c/2bec122b9fb91507a758ab5e3e5c4fbe7cb3f61b
• https://git.kernel.org/stable/c/b198ed4e52580a7238c7c7082f03906f8b310313
• https://git.kernel.org/stable/c/3dee9d0c198faeb95d052c1b94c2958751a28512
• https://git.kernel.org/stable/c/899ee91156e57784090c5565e4f31bd7dbffbc5a

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Enriched from CVE.org, NVD (this product uses the NVD API but is not endorsed or certified by the NVD), FIRST EPSS, CISA KEV, and GitHub Security Advisories.