Vulnerability Description
On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the mounted files, leading them to be set on the upper files without the appropriate security checks.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Canonical | Ubuntu Linux | 23.04 |
Related Weaknesses (CWE)
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640Third Party Advisory
- https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.htmlMailing ListPatch
- https://ubuntu.com/security/notices/USN-6250-1Vendor Advisory
- https://wiz.io/blog/ubuntu-overlayfs-vulnerabilityExploitMitigationThird Party Advisory
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640Third Party Advisory
- https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.htmlMailing ListPatch
- https://ubuntu.com/security/notices/USN-6250-1Vendor Advisory
- https://wiz.io/blog/ubuntu-overlayfs-vulnerabilityExploitMitigationThird Party Advisory
FAQ
What is CVE-2023-2640?
CVE-2023-2640 is a vulnerability with a CVSS score of 7.8 (HIGH). On Ubuntu kernels carrying both c914c0e27eb0 and "UBUNTU: SAUCE: overlayfs: Skip permission checking for trusted.overlayfs.* xattrs", an unprivileged user may set privileged extended attributes on the...
How severe is CVE-2023-2640?
CVE-2023-2640 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-2640?
Check the references section above for vendor advisories and patch information. Affected products include: Canonical Ubuntu Linux.