CVE-2022-49895
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49895
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49895.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-49895
- Related
- Published
- 2025-05-01T15:16:14Z
- Modified
- 2025-05-07T13:19:26Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Fix decoder allocation crash
When an intermediate port's decoders have been exhausted by existing regions, and creating a new region with the port in question in it's hierarchical path is attempted, cxlportattach_region() fails to find a port decoder (as would be expected), and drops into the failure / cleanup path.
However, during cleanup of the region reference, a sanity check attempts to dereference the decoder, which in the above case didn't exist. This causes a NULL pointer dereference BUG.
To fix this, refactor the decoder allocation and de-allocation into helper routines, and in this 'free' routine, check that the decoder, @cxld, is valid before attempting any operations on it.
- References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source