High severity7.8NVD Advisory· Published Jul 26, 2023· Updated Jun 17, 2026
CVE-2023-2640
CVE-2023-2640
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.
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Affected products
3- cpe:2.3:o:canonical:ubuntu_linux:23.04:*:*:*:*:*:*:*
- Canonical/Ubuntu Kernelv5Range: 0
Patches
Vulnerability mechanics
References
4- lists.ubuntu.com/archives/kernel-team/2023-July/140923.htmlnvdMailing ListPatch
- wiz.io/blog/ubuntu-overlayfs-vulnerabilitynvdExploitMitigationThird Party Advisory
- cve.mitre.org/cgi-bin/cvename.cginvdThird Party Advisory
- ubuntu.com/security/notices/USN-6250-1nvdVendor Advisory
News mentions
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