CVE-2023-2612 — Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux
Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock).
Published
2023-05-30T23:12:29.867Z
Last modified
2025-02-13T16:44:50.457Z
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
01What is this vulnerability?
Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock).
02Affected products
| Vendor | Product | Versions |
|---|
| Canonical Ltd. | ubuntu | linux — 0 |
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2023-05-30T23:12:29.867Z
- Last modified: 2025-02-13T16:44:50.457Z
09References
- git.launchpad.net — https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/kinetic/commi…
- ubuntu.com — https://ubuntu.com/security/CVE-2023-2612
- ubuntu.com — https://ubuntu.com/security/notices/USN-6122-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-6123-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-6124-1
- ubuntu.com — https://ubuntu.com/security/notices/USN-6127-1
- packetstormsecurity.com — http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LS…
Want this in your SOAR or SIEM?
SARA's API returns EPSS, CVSS, KEV, and an analyst-grade summary in one call.
Read the API reference →