# CVE-2022-48874: linux: In the Linux kernel, the following vulnerability has been resolved:  misc: fastrpc: Fix use-after-free and race in fa...

CVE-2022-48874 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48874, released August 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-48874
- Priority: High
- CVSS: 7.8 (high)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Aug 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  misc: fastrpc: Fix use-after-free and race in fastrpc_map_find  Currently, there is a race window between the point when the mutex is unlocked in fastrpc_map_lookup and the reference count increasing (fastrpc_map_get) in fastrpc_map_find, which can also lead to use-after-free.  So lets merge fastrpc_map_find into fastrpc_map_lookup which allows us to both protect the maps list by also taking the &fl->lock spinlock and the reference count, since the spinlock will be released only after. Add take_ref argument to make this suitable for all callers.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.1.8-1 | [DEBIAN-CVE-2022-48874](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48874.md) | Aug 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.1.8-1 | [DEBIAN-CVE-2022-48874](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48874.md) | Aug 21, 2024 |
| Linux | linux Debian 14 | 6.1.8-1 | [DEBIAN-CVE-2022-48874](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48874.md) | Aug 21, 2024 |

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