CVE-2022-50506
- Source
- https://cve.org/CVERecord?id=CVE-2022-50506
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-50506.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2022-50506
- Downstream
- Published
- 2025-10-04T15:43:54.955Z
- Modified
- 2026-03-20T11:00:38.718075Z
- Summary
- drbd: only clone bio if we have a backing device
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drbd: only clone bio if we have a backing device
Commit c347a787e34cb (drbd: set ->bibdev in drbdreqnew) moved a biosetdev call (which has since been removed) to "earlier", from drbdrequestprepare to drbdreq_new.
The problem is that this accesses device->ldev->backing_bdev, which is not NULL-checked at this point. When we don't have an ldev (i.e. when the DRBD device is diskless), this leads to a null pointer deref.
So, only allocate the private_bio if we actually have a disk. This is also a small optimization, since we don't clone the bio to only to immediately free it again in the diskless case.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50506.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/05580a3bbf3cec677cb00a85dfeb21d6a9b48eaf
- https://git.kernel.org/stable/c/6d42ddf7f27b6723549ee6d4c8b1b418b59bf6b5
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/50xxx/CVE-2022-50506.json
- https://nvd.nist.gov/vuln/detail/CVE-2022-50506
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git