CVE-2022-49895
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2022-49895
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49895.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-49895
- Downstream
- Published
- 2025-05-01T14:10:37.707Z
- Modified
- 2025-11-28T02:34:10.868358Z
- 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
- cxl/region: Fix decoder allocation crash
- 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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49895.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/71ee71d7adcba648077997a29a91158d20c40b09
- https://git.kernel.org/stable/c/c6813b5610ac53af73edd87a660d23a0511faa47
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49895.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-49895