CVE-2022-48994

ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event

State: Published
Severity: Not scored
Published: Oct 21, 2024
Updated: May 11, 2026
Reserved: Aug 22, 2024

Description

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

ALSA: seq: Fix function prototype mismatch in snd_seq_expand_var_event

With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed.

seq_copy_in_user() and seq_copy_in_kernel() did not have prototypes matching snd_seq_dump_func_t. Adjust this and remove the casts. There are not resulting binary output differences.

This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b38486e82ecb9f3046e0184205f6b61408fc40c9Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e385360705a0b346bdb57ce938249175d0613b8aAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2f46e95bf344abc4e74f8158901d32a869e0adb6Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 63badfed200219ca656968725f1a43df293ac936Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 15c42ab8d43acb73e2eba361ad05822c0af0ecfaAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fccd454129f6a0739651f7f58307cdb631fd6e89Affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 13ee8fb5410b740c8dd2867d3557c7662f7dda2dAffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 05530ef7cf7c7d700f6753f058999b1b5099a026Affected
LinuxLinux	2.6.12Affected before 2.6.12Not affected 4.9.336 through 4.9.Not affected 4.14.302 through 4.14.Not affected 4.19.269 through 4.19.Not affected 5.4.227 through 5.4.Not affected 5.10.159 through 5.10.Not affected 5.15.83 through 5.15.Not affected 6.0.13 through 6.0.*Not affected 6.1 and laterNot affected

Product

Versions

LinuxLinux

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before b38486e82ecb9f3046e0184205f6b61408fc40c9Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before e385360705a0b346bdb57ce938249175d0613b8aAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 2f46e95bf344abc4e74f8158901d32a869e0adb6Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 63badfed200219ca656968725f1a43df293ac936Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 15c42ab8d43acb73e2eba361ad05822c0af0ecfaAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before fccd454129f6a0739651f7f58307cdb631fd6e89Affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 13ee8fb5410b740c8dd2867d3557c7662f7dda2dAffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to before 05530ef7cf7c7d700f6753f058999b1b5099a026Affected

LinuxLinux

2.6.12Affected
before 2.6.12Not affected
4.9.336 through 4.9.*Not affected
4.14.302 through 4.14.*Not affected
4.19.269 through 4.19.*Not affected
5.4.227 through 5.4.*Not affected
5.10.159 through 5.10.*Not affected
5.15.83 through 5.15.*Not affected
6.0.13 through 6.0.*Not affected
6.1 and laterNot affected

References

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