CVE-2026-52914

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-52914

Key Details

CVE	CVE-2026-52914
CVSS Score / Version	9.8 (Critical) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is network; attack complexity is low; privileges required is none; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel
Classified as	CWE-787 (Out-of-bounds Write)

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

batman-adv: fix fragment reassembly length accounting

batman-adv keeps a running payload length for queued fragments and uses it

to validate a fragment chain before reassembly.

That accounting currently allows the accumulated fragment length to be

truncated during updates. As a result, malformed fragment chains can

bypass the intended validation and drive reassembly with inconsistent

length state, leading to a local denial of service.

Fix the accounting by storing the accumulated length in a length-typed

field and rejecting update overflows before the existing validation logic

runs.

The fix was verified against the original reproducer and against valid

fragment reassembly paths. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-52914
CVE	https://www.cve.org/CVERecord?id=CVE-2026-52914

Source

Reference

NVD

CVE