VulnerabilityAnalyzed

CVE-2023-4458

An attacker can leverage this to disclose sensitive information on affected installations of Linux.

HIGH 7.5EPSS 0.84%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.84%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

Description

A flaw was found within the parsing of extended attributes in the kernel ksmbd module. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this to disclose sensitive information on affected installations of Linux. Only systems with ksmbd enabled are vulnerable to this CVE.

CVSS 3.1: 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS: 0.84% probability · 56th percentile
CISA KEV: Not listed
Weakness: CWE-125
Affected: linux/linux kernel
Source: patrick@puiterwijk.org

References

https://access.redhat.com/security/cve/CVE-2023-4458Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2325516Issue Tracking, Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-24-590/Third Party Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.