CVE-2024-42265

Summary

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

protect the fetch of ->fd[fd] in do_dup2() from mispredictions

both callers have verified that fd is not greater than ->max_fds; however, misprediction might end up with tofree = fdt->fd[fd]; being speculatively executed. That's wrong for the same reasons why it's wrong in close_fd()/file_close_fd_locked(); the same solution applies - array_index_nospec(fd, fdt->max_fds) could differ from fd only in case of speculative execution on mispredicted path.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < ed42e8ff509d2a61c6642d1825032072dab79f26affected
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < 41a6c31df77bd8e050136b0a200b537da9e1084aaffected
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < 08775b3d6ed117cf4518754ec7300ee42b6a5368affected
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < 3f480493550b6a23d3a65d095d6569d4a7f56a0faffected
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < 5db999fff545b924b24c9afd368ef5c17279b176affected
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < da72e783afd27d9f487836b2e6738146c0edd149affected
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < 1171ceccabfd596ca370c5d2cbb47d110c3f2fe1affected
LinuxLinux8280d16172243702ed43432f826ca6130edb4086 < 8aa37bde1a7b645816cda8b80df4753ecf172bf1affected
LinuxLinux3.7affected
LinuxLinux0 < 3.7unaffected
LinuxLinux4.19.320 <= 4.19.*unaffected
LinuxLinux5.4.282 <= 5.4.*unaffected
LinuxLinux5.10.224 <= 5.10.*unaffected
LinuxLinux5.15.165 <= 5.15.*unaffected
LinuxLinux6.1.104 <= 6.1.*unaffected
LinuxLinux6.6.45 <= 6.6.*unaffected
LinuxLinux6.10.4 <= 6.10.*unaffected
LinuxLinux6.11 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

Additional References

References