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CVE-2023-3389

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Date: June 28, 2023

A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Racing a io_uring cancel poll request with a linked timeout can cause a UAF in a hrtimer. We recommend upgrading past commit ef7dfac51d8ed961b742218f526bd589f3900a59 (4716c73b188566865bdd79c3a6709696a224ac04 for 5.10 stable and 0e388fce7aec40992eadee654193cad345d62663 for 5.15 stable).

Language: C

Severity Score

Related Resources (13)

https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
https://www.debian.org/security/2023/dsa-5480
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.10.y&id=4716c73b188566865bdd79c3a6709696a224ac04
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef7dfac51d8ed961b742218f526bd589f3900a59
https://nvd.nist.gov/vuln/detail/CVE-2023-3389
https://kernel.dance/4716c73b188566865bdd79c3a6709696a224ac04
https://security.netapp.com/advisory/ntap-20230731-0001/
https://kernel.dance/ef7dfac51d8ed961b742218f526bd589f3900a59
https://access.redhat.com/security/cve/CVE-2023-3389
https://kernel.dance/0e388fce7aec40992eadee654193cad345d62663
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-5.15.y&id=0e388fce7aec40992eadee654193cad345d62663
http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html
https://www.mend.io/vulnerability-database/CVE-2023-3389

Severity Score

Weakness Type (CWE)

Use After Free

CWE-416

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): LOW
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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