CVE-2022-48740

Summary

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

selinux: fix double free of cond_list on error paths

On error path from cond_read_list() and duplicate_policydb_cond_list() the cond_list_destroy() gets called a second time in caller functions, resulting in NULL pointer deref. Fix this by resetting the cond_list_len to 0 in cond_list_destroy(), making subsequent calls a noop.

Also consistently reset the cond_list pointer to NULL after freeing.

[PM: fix line lengths in the description]

Affected Software

VendorProductVersion RangeStatus
LinuxLinux60abd3181db29ea81742106cc0ac2e27fd05b418 < f446089a268c8fc6908488e991d28a9b936293dbaffected
LinuxLinux60abd3181db29ea81742106cc0ac2e27fd05b418 < 70caa32e6d81f45f0702070c0e4dfe945e92fbd7affected
LinuxLinux60abd3181db29ea81742106cc0ac2e27fd05b418 < 7ed9cbf7ac0d4ed86b356e1b944304ae9ee450d4affected
LinuxLinux60abd3181db29ea81742106cc0ac2e27fd05b418 < 186edf7e368c40d06cf727a1ad14698ea67b74adaffected
LinuxLinux5.7affected
LinuxLinux0 < 5.7unaffected
LinuxLinux5.10.99 <= 5.10.*unaffected
LinuxLinux5.15.22 <= 5.15.*unaffected
LinuxLinux5.16.8 <= 5.16.*unaffected
LinuxLinux5.17 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References