CVE-2022-48873: misc: fastrpc: Don't remove map on creater_process and device_release

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-08-21 · updated 2026-08-04
Weakness: CWE-416

Description

In the Linux kernel, the following vulnerability has been resolved: misc: fastrpc: Don't remove map on creater_process and device_release Do not remove the map from the list on error path in fastrpc_init_create_process, instead call fastrpc_map_put, to avoid use-after-free. Do not remove it on fastrpc_device_release either, call fastrpc_map_put instead. The fastrpc_free_map is the only proper place to remove the map. This is called only after the reference count is 0.

Affected products

Linux kernel: from 5.2 before 5.4.230; from 5.5 before 5.10.165; from 5.11 before 5.15.90; from 5.16 before 6.1.8; 6.2-rc1, 6.2-rc2, 6.2-rc3, 6.2-rc4 — fixed in 5.10.165, 5.15.90, 5.4.230, 6.1.8

How to fix

Upgrade to a fixed version: Linux kernel 5.10.165, 5.15.90, 5.4.230, 6.1.8. Check the vendor advisory for mitigations.

References

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