CVE-2026-53130: fs/omfs: reject s_sys_blocksize smaller than OMFS_DIR_START
CSIRTS triage
- What
- Rejects s_sys_blocksize smaller than OMFS_DIR_START.
- Who is affected
- Deployments using the omfs filesystem in Linux.
- Urgency
- Immediate remediation is critical due to the critical severity rating.
- Action
- Update to the latest kernel version that resolves this issue.
AI-assisted analysis generated from the source advisory — verify against the original.
⚡ Watch fs/omfs
Get an email when a new fs/omfs advisory drops — max one per day, one-click unsubscribe.
Details
Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-53130
Exploitation outlook
EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.
- Low exploitation riskCVE-2026-531300.13% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 3% of all scored CVEs.
Referenced CVEs
| CVE | CSIRTS overview | External |
|---|---|---|
| CVE-2026-53130 | coverage & exploitation status | NVD · CVE.org |
More from Microsoft Security Response Center
- highCVE-2026-12064: proto-default skips SSH verification2026-07-02
- unknownCVE-2026-14125: Chromium: CVE-2026-14125 Uninitialized Use in ANGLE2026-07-02
- mediumCVE-2026-57987: Microsoft Edge (Chromium-based) Spoofing Vulnerability2026-07-02
- unknownCVE-2026-13775: Chromium: CVE-2026-13775 Use after free in GPU2026-07-02
- unknownCVE-2026-13779: Chromium: CVE-2026-13779 Use after free in Chromoting2026-07-02