CVE-2026-46331

CVE Enrichment

CVSS: 7.8 HIGH
EPSS: 0.58%
EPSS Percentile: 46.32%
CISA KEV: Not listed

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.

Technical Details

CVSS Version: 3.1
CNA / NVD Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published: 16-Jun-2026 15:16
Last Modified: 02-Sep-2026 20:17
EPSS Date: 2026-10-11
CWE: CWE-190, CWE-787

CVSS Vector


            CVSS:3.1                            AV:L /
                            AC:L /
                            PR:L /
                            UI:N /
                            S:U /
                            C:H /
                            I:H /
                            A:H

Affected Products / Versions

linux / linux_kernel
Version / affected range: * · from (inclusive) 4.19.244 · before (exclusive) 4.20
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.4.195 · before (exclusive) 5.5
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.10.117 · before (exclusive) 5.11
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.15.41 · before (exclusive) 5.16
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.17.9 · before (exclusive) 5.18
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 5.18.1 · before (exclusive) 6.12.94
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.13 · before (exclusive) 6.18.36
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: * · from (inclusive) 6.19 · before (exclusive) 7.0.13
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 5.18
cpe:2.3:o:linux:linux_kernel:5.18:-:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 5.18
cpe:2.3:o:linux:linux_kernel:5.18:rc7:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:*
linux / linux_kernel
Version / affected range: 7.1
cpe:2.3:o:linux:linux_kernel:7.1:rc6:*:*:*:*:*:*

References

Last enrichment sync: 12-Oct-2026 01:21
Sources: NVD · FIRST EPSS · CISA KEV
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Reported Context (1)

CVE-2026-46331 (pedit COW): a vulnerability in the Linux kernel’s traffic control subsystem (tc-pedit) that exploits a flaw in copy-on-write to modify the page cache and subsequently escalate privileges to root Kaspersky Reports Rising Vulnerability Disclosures and Early Exploit Releases in Q2 2026

CVE (26)

People (2)

Vendors (2)

Products (15)

Tools (4)

Note: Related entities, including threat actors, malware, CVEs, MITRE ATT&CK techniques, vendors, products, tools, countries, and industries, are shown when they appear in the same reporting. Their presence does not necessarily mean they were targeted, compromised, vulnerable, responsible for the activity, or directly involved in the incident.