Strix
58.1K

CVE-2026-74349

HIGHCVSS 7.1/10EPSS 0.18%

Last modified

CVE-2026-74349 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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 -= ... EPSS estimates a 0.18% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
7.1/10

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

EPSS Probability
0.18%

7.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= aa89762c54800208d5afdcd8e6bf124818f17fe0, < d903d59c0315f59bdf0214b4f13d71c9feb2c45c; >= aa89762c54800208d5afdcd8e6bf124818f17fe0, < 441abb77222f155e8d931dbabb465466db01cfd7; >= aa89762c54800208d5afdcd8e6bf124818f17fe0, < e652d0f5108e447b22da4249bcd23dd1b63c73dd; >= aa89762c54800208d5afdcd8e6bf124818f17fe0, < 346314bb0cc2fc52b50b73d6ecc62e0217455c2e; >= aa89762c54800208d5afdcd8e6bf124818f17fe0, < 06c0a0431b9856506fcd9b2c1b0c6136567d756d; >= aa89762c54800208d5afdcd8e6bf124818f17fe0, < 3fa7139b5f42731a61f78c42433adae13f9adc21; >= aa89762c54800208d5afdcd8e6bf124818f17fe0, < 2c13e02592b918be7725ab5965e01ef4e46c4b57; >= aa89762c54800208d5afdcd8e6bf124818f17fe0, < ca1afd88f5eaaff9168e1466e5401385edf59543
LinuxLinux3.14

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74349?
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.
How severe is CVE-2026-74349?
CVE-2026-74349 has a CVSS score of 7.1/10 (HIGH severity). The EPSS model estimates a 0.18% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74349?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-74349?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST