CVE-2024-35880

Summary

In the Linux kernel, the following vulnerability has been resolved:

io_uring/kbuf: hold io_buffer_list reference over mmap

If we look up the kbuf, ensure that it doesn't get unregistered until after we're done with it. Since we're inside mmap, we cannot safely use the io_uring lock. Rely on the fact that we can lookup the buffer list under RCU now and grab a reference to it, preventing it from being unregistered until we're done with it. The lookup returns the io_buffer_list directly with it referenced.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux09f7520048eaaee9709091cd2787966f807da7c5 < 65938e81df2197203bda4b9a0c477e7987218d66affected
LinuxLinux5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 < 5fd8e2359498043e0b5329a05f02d10a9eb91eb9affected
LinuxLinux5cf4f52e6d8aa2d3b7728f568abbf9d42a3af252 < 561e4f9451d65fc2f7eef564e0064373e3019793affected
LinuxLinux6.6.5 < 6.6.26affected
LinuxLinux6.7affected
LinuxLinux0 < 6.7unaffected
LinuxLinux6.6.26 <= 6.6.*unaffected
LinuxLinux6.8.5 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

CVE Program Container

Additional References

References