CVE-2026-22991

Summary

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

libceph: make free_choose_arg_map() resilient to partial allocation

free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation.

For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer.

To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux5cf9c4a9959b6273675310d14a834ef14fbca37c < 9b3730dabcf3764bfe3ff07caf55e641a0b45234affected
LinuxLinux5cf9c4a9959b6273675310d14a834ef14fbca37c < 851241d3f78a5505224dc21c03d8692f530256b4affected
LinuxLinux5cf9c4a9959b6273675310d14a834ef14fbca37c < ec1850f663da64842614c86b20fe734be070c2baaffected
LinuxLinux5cf9c4a9959b6273675310d14a834ef14fbca37c < 8081faaf089db5280c3be820948469f7c58ef8ddaffected
LinuxLinux5cf9c4a9959b6273675310d14a834ef14fbca37c < c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdfaffected
LinuxLinux5cf9c4a9959b6273675310d14a834ef14fbca37c < f21c3fdb96833aac2f533506899fe38c19cf49d5affected
LinuxLinux5cf9c4a9959b6273675310d14a834ef14fbca37c < e3fe30e57649c551757a02e1cad073c47e1e075eaffected
LinuxLinux4.13affected
LinuxLinux0 < 4.13unaffected
LinuxLinux5.10.248 <= 5.10.*unaffected
LinuxLinux5.15.198 <= 5.15.*unaffected
LinuxLinux6.1.161 <= 6.1.*unaffected
LinuxLinux6.6.121 <= 6.6.*unaffected
LinuxLinux6.12.66 <= 6.12.*unaffected
LinuxLinux6.18.6 <= 6.18.*unaffected
LinuxLinux6.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: partial

References