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CVE PROGRAM SOURCE RECORDUnscored

CVE-2023-54324

dm: fix a race condition in retrieve_deps

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: dm: fix a race condition in retrieve_deps There's a race condition in the multipath target when retrieve_deps races with multipath_message calling dm_get_device and dm_put_device. retrieve_deps walks the list of open devices without holding any lock but multipath may add or remove devices to the list while it is running. The end result may be memory corruption or use-after-free memory access. See this description of a UAF with multipath_message(): https://listman.redhat.com/archives/dm-devel/2022-October/052373.html Fix this bug by introducing a new rw semaphore "devices_lock". We grab devices_lock for read in retrieve_deps and we grab it for write in dm_get_device and dm_put_device.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < dbf1a719850577bb51fc7512a3972994b797a17baffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 38f6e5ae5d9ff4a4050ea6f7b543d5d5a4e087cfaffected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < f6007dce0cd35d634d9be91ef3515a6385dcee16affected

Linux Linux

Default version status: affected

  • 2.6.12affected
  • 0 to < 2.6.12unaffected
  • 6.1.56 to ≤ 6.1.*unaffected
  • 6.5.5 to ≤ 6.5.*unaffected
  • 6.6 to ≤ *unaffected

References