CVE-2023-2236

Summary

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.

Affected Software

Weaknesses

• CWE-416: CWE-416 Use After Free

ADP Enrichment

CVE Program Container

Additional References

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4
• https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4
• https://security.netapp.com/advisory/ntap-20230601-0010/

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: total

References

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9d94c04c0db024922e886c9fd429659f22f48ea4
• https://kernel.dance/9d94c04c0db024922e886c9fd429659f22f48ea4
• https://security.netapp.com/advisory/ntap-20230601-0010/

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