{"timestamp":"2024-05-24T19:17:49.041066Z","id":"CVE-2021-47533","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","programFiles":["drivers/gpu/drm/vc4/vc4_kms.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"9ec03d7f1ed394897891319a4dda75f52c5d292d","lessThan":"2931db9a5ed219546cf2ae0546698faf78281b89","versionType":"git","status":"affected"},{"version":"9ec03d7f1ed394897891319a4dda75f52c5d292d","lessThan":"d134c5ff71c7f2320fc7997f2fbbdedf0c76889a","versionType":"git","status":"affected"}]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","programFiles":["drivers/gpu/drm/vc4/vc4_kms.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","versions":[{"version":"5.12","status":"affected"},{"version":"0","lessThan":"5.12","versionType":"semver","status":"unaffected"},{"version":"5.15.7","lessThanOrEqual":"5.15.*","versionType":"semver","status":"unaffected"},{"version":"5.16","lessThanOrEqual":"*","versionType":"original_commit_for_fix","status":"unaffected"}]}]

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-416

OR
          *cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
          *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.15.7

CVE: https://git.kernel.org/stable/c/2931db9a5ed219546cf2ae0546698faf78281b89 Types: Patch

CVE: https://git.kernel.org/stable/c/d134c5ff71c7f2320fc7997f2fbbdedf0c76889a Types: Patch

kernel.org: https://git.kernel.org/stable/c/2931db9a5ed219546cf2ae0546698faf78281b89 Types: Patch

kernel.org: https://git.kernel.org/stable/c/d134c5ff71c7f2320fc7997f2fbbdedf0c76889a Types: Patch

https://git.kernel.org/stable/c/2931db9a5ed219546cf2ae0546698faf78281b89

https://git.kernel.org/stable/c/d134c5ff71c7f2320fc7997f2fbbdedf0c76889a

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

drm/vc4: kms: Clear the HVS FIFO commit pointer once done

Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a
commit") introduced a wait on the previous commit done on a given HVS
FIFO.

However, we never cleared that pointer once done. Since
drm_crtc_commit_put can free the drm_crtc_commit structure directly if
we were the last user, this means that it can lead to a use-after free
if we were to duplicate the state, and that stale pointer would even be
copied to the new state.

Set the pointer to NULL once we're done with the wait so that we don't
carry over a pointer to a free'd structure.

kernel.org https://git.kernel.org/stable/c/2931db9a5ed219546cf2ae0546698faf78281b89 [No types assigned]

kernel.org https://git.kernel.org/stable/c/d134c5ff71c7f2320fc7997f2fbbdedf0c76889a [No types assigned]