CVE-2022-48872

Source
https://nvd.nist.gov/vuln/detail/CVE-2022-48872
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-48872.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-48872
Downstream
Related
Published
2024-08-21T07:15:04Z
Modified
2025-08-09T20:01:27Z
Severity
  • 7.0 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

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

misc: fastrpc: Fix use-after-free race condition for maps

It is possible that in between calling fastrpcmapget() until map->fl->lock is taken in fastrpcfreemap(), another thread can call fastrpcmaplookup() and get a reference to a map that is about to be deleted.

Rewrite fastrpcmapget() to only increase the reference count of a map if it's non-zero. Propagate this to callers so they can know if a map is about to be deleted.

Fixes this warning: refcountt: addition on 0; use-after-free. WARNING: CPU: 5 PID: 10100 at lib/refcount.c:25 refcountwarnsaturate ... Call trace: refcountwarnsaturate [fastrpcmapget inlined] [fastrpcmaplookup inlined] fastrpcmapcreate fastrpcinternalinvoke fastrpcdeviceioctl _arm64sysioctl invoke_syscall

References

Affected packages