DEBIAN-CVE-2022-50530
- Source
- https://security-tracker.debian.org/tracker/CVE-2022-50530
- Import Source
- https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50530.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2022-50530
- Upstream
- Published
- 2025-10-07T16:15:37Z
- Modified
- 2025-10-08T08:01:43Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved: blk-mq: fix null pointer dereference in blkmqclearrqmapping() Our syzkaller report a null pointer dereference, root cause is following: _blkmqallocmapandrqs set->tags[hctxidx] = blkmqallocmapandrqs blkmqallocmapandrqs blkmqallocrqs // failed due to oom allocpagesnode // set->tags[hctxidx] is still NULL blkmqfreerqs drvtags = set->tags[hctxidx]; // null pointer dereference is triggered blkmqclearrqmapping(drvtags, ...) This is because commit 63064be150e4 ("blk-mq: Add blkmqallocmapandrqs()") merged the two steps: 1) set->tags[hctxidx] = blkmqallocrqmap() 2) blkmqallocrqs(..., set->tags[hctxidx]) into one step: set->tags[hctxidx] = blkmqallocmapandrqs() Since tags is not initialized yet in this case, fix the problem by checking if tags is NULL pointer in blkmqclearrq_mapping().
- 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
Debian:14 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source