CVE-2022-48874

HIGH EPSS 13.7%
Published Aug 21, 20241y ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Aug 21, 2024 1y ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
13.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 1

VendorProductVersionRange
linuxlinux_kernel*≥5.18  –  <6.1.8

References 2

  • git.kernel.org https://git.kernel.org/stable/c/9446fa1683a7e3937d9970248ced427c1983a1c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a50c5c25b6e7d2824698c0e6385f882a18f4a498
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/9446fa1683a7e3937d9970248ced427c1983a1c5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a50c5c25b6e7d2824698c0e6385f882a18f4a498
    Patch