CVE-2023-2640

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

15.20% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 96.5% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Important. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-07-26 01:59Z3 YR AGO

Last updated

2024-10-23 14:59Z1 YR AGO

Reserved

2023-05-10

Assigning CNA

canonical

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weaknesses

• CWE-863Incorrect AuthorizationClass

Data version

5.1

Document digest

27fd6ddd234c1cd549498480e42f5a8981a0c7d640063052db871352dea22fb0

• ubuntu.comhttps://ubuntu.com/security/notices/USN-6250-1vendor-advisory
• cve.mitre.orghttps://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-2640issue-tracking
• wiz.iohttps://wiz.io/blog/ubuntu-overlayfs-vulnerabilitytechnical-description
• lists.ubuntu.comhttps://lists.ubuntu.com/archives/kernel-team/2023-July/140923.htmlmailing-list