CVE-2023-2640
CVSS v3
7.8
HIGH
EPSS Score
15.2 %
exploit probability, as of 2026-10-05
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- Published
- 2023-07-26
Frequently asked questions
What is 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.
Is CVE-2023-2640 actively exploited?
Active exploitation of CVE-2023-2640 has not been confirmed. Its EPSS score was 15.2% on 2026-10-05, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2023-2640?
CVE-2023-2640 has a CVSS v3 base score of 7.8 (HIGH severity).
Is CVE-2023-2640 affecting your environment?
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