Vulnerability Description
A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Both io_install_fixed_file and its callers call fput in a file in case of an error, causing a reference underflow which leads to a use-after-free vulnerability. We recommend upgrading past commit 9d94c04c0db024922e886c9fd429659f22f48ea4.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.19, < 6.0.11 |
| Netapp | Hci Baseboard Management Controller | h300s |
Related Weaknesses (CWE)
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9dExploitMailing ListPatch
- https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4ExploitPatch
- https://security.netapp.com/advisory/ntap-20230601-0010/Vendor Advisory
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9dExploitMailing ListPatch
- https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4ExploitPatch
- https://security.netapp.com/advisory/ntap-20230601-0010/Vendor Advisory
FAQ
What is CVE-2023-2236?
CVE-2023-2236 is a vulnerability with a CVSS score of 7.8 (HIGH). A use-after-free vulnerability in the Linux Kernel io_uring subsystem can be exploited to achieve local privilege escalation. Both io_install_fixed_file and its callers call fput in a file in case of...
How severe is CVE-2023-2236?
CVE-2023-2236 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-2023-2236?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Netapp Hci Baseboard Management Controller.