Cyber Resilience

CVE-2026-43452

High

Published: 08 May 2026

Published
08 May 2026
Modified
21 May 2026
KEV Added
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Patch
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CVSS Score v3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
EPSS Score 0.0044 35.5th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-43452 is a high-severity an unspecified weakness vulnerability in Linux Linux Kernel. Its CVSS base score is 8.2 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 35.5th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

EU & UK References

Vulnerability details

In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ?…

more

: 1 can read op[i + 1] past the end of the option area. Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.

CWE(s)
NVD-CWE-noinfo

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
attack.mitre.org →
T1499.004 Application or System Exploitation Impact
Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.
attack.mitre.org →
Why these techniques?

OOB read in netfilter xt_tcpudp/xt_dccp option parsing enables kernel exploitation for local privilege escalation or system DoS via crafted packets.

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

Affected Assets

linux
linux kernel
7.0 · 2.6.16 — 5.10.253 · 5.11 — 5.15.203 · 5.16 — 6.1.167

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References