Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.14, < 6.4 |
| Debian | Debian Linux | 10.0 |
Related Weaknesses (CWE)
References
- http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LS
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04cMailing ListPatchVendor Advisory
- https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bcVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://security.netapp.com/advisory/ntap-20230818-0005/Third Party Advisory
- https://www.debian.org/security/2023/dsa-5480Third Party Advisory
- http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSThird Party AdvisoryVDB Entry
- http://packetstormsecurity.com/files/175963/Kernel-Live-Patch-Security-Notice-LS
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=04cMailing ListPatchVendor Advisory
- https://kernel.dance/04c55383fa5689357bcdd2c8036725a55ed632bcVendor Advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://security.netapp.com/advisory/ntap-20230818-0005/Third Party Advisory
FAQ
What is CVE-2023-3609?
CVE-2023-3609 is a vulnerability with a CVSS score of 7.8 (HIGH). 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...
How severe is CVE-2023-3609?
CVE-2023-3609 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-3609?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux.