Threat Intelligence / CVE / CVE-2026-46331

CVE-2026-46331 — Linux

EPSS 0.2% (higher than 20.7% of all scored CVEs) · Priority 2.8/10 · Published 2026-06-16

As of 2026-06-19, CVE-2026-46331 is a vulnerability in Linux, EPSS 0.2% (20.7th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2026-46331, most recently “Linux Kernel act_pedit COW Out-of-Bounds Write Enables Local Privilege Escalation to Root (CVE-2026-46331)”.

Last updated: 2026-06-19

What is 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.

1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 88 days ago.

Severity and exploitation probability

EPSS (FIRST)
0.2% probability of exploitation in the next 30 days, higher than 20.7% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
2.8/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2026-06-16, last modified 2026-06-19

Is CVE-2026-46331 being exploited?

Weaponised exploit code for CVE-2026-46331 is publicly available. 3 public proof-of-concept repositories are tracked for this identifier.

Affected products and versions

How to fix CVE-2026-46331

No vendor patch reference has been recorded for CVE-2026-46331 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

Threat activity tracking CVE-2026-46331

2 tracked threats in the Threadlinqs corpus reference CVE-2026-46331, either in the campaign’s CVE list or as an indicator on the campaign record.

Sources

Enriched from CVE.org, NVD, FIRST EPSS, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on . This product uses the NVD API but is not endorsed or certified by the NVD.

Other references

Full detection coverage & IOCs for threats exploiting CVE-2026-46331 are available via the Threadlinqs MCP server (Purple tier). View plans →

← all vulnerabilities · Markdown version · Threadlinqs Intelligence