CVE-2026-74349

Last refreshed2026-10-17

Status: UPDATED | Advisory ID: CVE-2026-74349

Key Details

CVE	CVE-2026-74349
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-16
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is none; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

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:

ocfs2: reject FITRIM ranges shorter than a cluster

ocfs2_trim_mainbm() trims the global bitmap in cluster units, but its

too-short range validation only checks sb->s_blocksize.

On filesystems with a cluster size larger than the block size, a FITRIM

range that is at least one block but shorter than one cluster is accepted

and shifted down to len == 0. The later start + len - 1 and len -= ...

arithmetic then underflows and can drive trimming past the requested

range.

Reject ranges shorter than s_clustersize instead. That preserves the

existing -EINVAL behavior for requests that cannot discard even one

allocation unit and keeps zero-cluster trims out of the group walk. (NVD)

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

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-74349
CVE	https://www.cve.org/CVERecord?id=CVE-2026-74349

Source

Reference

NVD

CVE