# CVE-2022-48994: linux: In the Linux kernel, the following vulnerability has been resolved:  ALSA: seq: Fix function prototype mismatch in sn...

CVE-2022-48994 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48994, released October 21, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48994
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0024
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Oct 21, 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.4-1 | [DEBIAN-CVE-2022-48994](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48994.md) | Oct 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.1.4-1 | [DEBIAN-CVE-2022-48994](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48994.md) | Oct 21, 2024 |
| Linux | linux Debian 14 | 6.1.4-1 | [DEBIAN-CVE-2022-48994](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48994.md) | Oct 21, 2024 |

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