CVE-2023-2640

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.

Score

CVSS 3.1 7.8 High

Status

Modified - security@ubuntu.com

Published

2023-07-26

Last modified

2024-10-23

Weaknesses

CWE-863

Affected products

• Ubantu Kernel (Canonical)
• Ubuntu Kernel (Canonical)
• Ubuntu Linux (Canonical)

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640
• https://lists.ubuntu.com/archives/kernel-team/2023-July/140923.html
• https://ubuntu.com/security/notices/USN-6250-1
• https://wiz.io/blog/ubuntu-overlayfs-vulnerability