CVE-2022-49413

Summary

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

bfq: Update cgroup information before merging bio

When the process is migrated to a different cgroup (or in case of writeback just starts submitting bios associated with a different cgroup) bfq_merge_bio() can operate with stale cgroup information in bic. Thus the bio can be merged to a request from a different cgroup or it can result in merging of bfqqs for different cgroups or bfqqs of already dead cgroups and causing possible use-after-free issues. Fix the problem by updating cgroup information in bfq_merge_bio().

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxe21b7a0b988772e82e7147e1c659a5afe2ae003c < da9f3025d595956410ceaab2bea01980d7775948affected
LinuxLinuxe21b7a0b988772e82e7147e1c659a5afe2ae003c < b06691af08b41dfd81052a3362514d9827b44bb1affected
LinuxLinuxe21b7a0b988772e82e7147e1c659a5afe2ae003c < e8821f45612f2e6d9adb9c6ba0fb4184f57692aaaffected
LinuxLinuxe21b7a0b988772e82e7147e1c659a5afe2ae003c < d9165200c5627a2cf4408eefabdf0058bdf95e1aaffected
LinuxLinuxe21b7a0b988772e82e7147e1c659a5afe2ae003c < 2a1077f17169a6059992a0bbdb330e0abad1e6d9affected
LinuxLinuxe21b7a0b988772e82e7147e1c659a5afe2ae003c < ea591cd4eb270393810e7be01feb8fde6a34fbbeaffected
LinuxLinux4.12affected
LinuxLinux0 < 4.12unaffected
LinuxLinux5.4.198 <= 5.4.*unaffected
LinuxLinux5.10.121 <= 5.10.*unaffected
LinuxLinux5.15.46 <= 5.15.*unaffected
LinuxLinux5.17.14 <= 5.17.*unaffected
LinuxLinux5.18.3 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References