In the Linux kernel, the following vulnerability has been resolved: ocfs2: reject FITRIM ranges shorter than a cluster ocfs2_trim_mainb…
CVE-2026-74349 · published 15 Aug 2026
How serious is it
- Severity: high, CVSS score 7.1 out of 10.
- No exploit prediction (EPSS) score yet.
- Not on the CISA list of exploited vulnerabilities.
- No public exploit in Exploit-DB.
Is your app affected by CVE-2026-74349?
Paste this prompt into Claude Code, Cursor or any AI coding tool: it runs a free Shippable scan of your project and fixes what it finds. Built with Lovable, Bolt or v0? Scan your live app. Or upload your package file.
Who is affected
- Linux Linux: 3.14
How to check
- Find out whether you run the affected product and which version, then compare it with the versions above.
How to fix
Copies a prompt for Claude Code, Cursor or Codex that asks it to check whether you run this product.
- Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
- If a vulnerable version was live, check your logs and rotate the secrets that server could read.
The advisory
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.
Check your whole app
Dependencies are only half of it. Free and read-only: before you push, run npx shippable-dev scan localhost:3000 in your project folder, no account needed. For your live app, you prove it's yours with a one-line tag first.
References
- git.kernel.org/stable/c/06c0a0431b9856506fcd9b2c1b0c6136567d756d
- git.kernel.org/stable/c/2c13e02592b918be7725ab5965e01ef4e46c4b57
- git.kernel.org/stable/c/346314bb0cc2fc52b50b73d6ecc62e0217455c2e
- git.kernel.org/stable/c/3fa7139b5f42731a61f78c42433adae13f9adc21
- git.kernel.org/stable/c/441abb77222f155e8d931dbabb465466db01cfd7
- git.kernel.org/stable/c/ca1afd88f5eaaff9168e1466e5401385edf59543
- git.kernel.org/stable/c/d903d59c0315f59bdf0214b4f13d71c9feb2c45c
- git.kernel.org/stable/c/e652d0f5108e447b22da4249bcd23dd1b63c73dd
Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON