Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-46331

Severity CVSS v4.0:
Pending analysis
Type:
CWE-190 Integer Overflow or Wraparound
Publication date:
16/06/2026
Last modified:
15/07/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> net/sched: fix pedit partial COW leading to page cache corruption<br /> <br /> tcf_pedit_act() computes the COW range for skb_ensure_writable()<br /> once before the key loop using tcfp_off_max_hint, but the hint does<br /> not account for the runtime header offset added by typed keys. This<br /> can leave part of the write region un-COW&amp;#39;d.<br /> <br /> Fix by moving skb_ensure_writable() inside the per-key loop where<br /> the actual write offset is known, and add overflow checking on the<br /> offset arithmetic. For negative offsets (e.g. Ethernet header edits<br /> at ingress), use skb_cow() to COW the headroom instead. Guard<br /> offset_valid() against INT_MIN, where negation is undefined.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.19.244 (including) 4.20 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.4.195 (including) 5.5 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.10.117 (including) 5.11 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.15.41 (including) 5.16 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.17.9 (including) 5.18 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.18.1 (including) 6.12.94 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.36 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 7.0.13 (excluding)
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:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools