Description
A use-after-free vulnerability in the Linux kernel's net/sched: cls_u32 component can be exploited to achieve local privilege escalation. If tcf_change_indev() fails, u32_set_parms() will immediately return an error after incrementing or decrementing the reference counter in tcf_bind_filter(). If an attacker can control the reference counter and set it to zero, they can cause the reference to be freed, leading to a use-after-free vulnerability. We recommend upgrading past commit 04c55383fa5689357bcdd2c8036725a55ed632bc.
CVSS breakdown
CVSS 3.1
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected products
- Linux / Kernel4.14 – 6.4
References
- MISChttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04c55383fa5689357bcdd2c8036725a55ed632bc
- MISChttps://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bc
- MISChttps://security.netapp.com/advisory/ntap-20230818-0005/
- VENDOR_ADVISORYhttps://www.debian.org/security/2023/dsa-5480
- EXPLOIThttp://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.html
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- EXPLOIThttp://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LSN-0099-1.html
- MAILING_LISThttps://lists.debian.org/debian-lts-announce/2024/01/msg00004.html