CVE-2023-3439

low-risk
Published 2023-06-28

A flaw was found in the MCTP protocol in the Linux kernel. The function mctp_unregister() reclaims the device's relevant resource when a netcard detaches. However, a running routine may be unaware of this and cause the use-after-free of the mdev->addrs object, potentially leading to a denial of service.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.7/10 Medium
LOCAL / HIGH complexity

Affected Products (5)

Affected Vendors

Linux

References (6)

Mailing List http://www.openwall.com/lists/oss-security/2023/07/02/1
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2217915
Patch https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a026...
Mailing List http://www.openwall.com/lists/oss-security/2023/07/02/1
Issue Tracking https://bugzilla.redhat.com/show_bug.cgi?id=2217915
Patch https://github.com/torvalds/linux/commit/b561275d633bcd8e0e8055ab86f1a13df75a026...
24
/ 100
low-risk
Severity 12/34 · Low
Exploitability 0/34 · Minimal
Exposure 12/34 · Low