CVE-2025-68373
- Source
- https://cve.org/CVERecord?id=CVE-2025-68373
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68373.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-68373
- Downstream
- Related
- Published
- 2025-12-24T10:33:03Z
- Modified
- 2026-08-12T03:30:48Z
- Summary
- md: avoid repeated calls to del_gendisk
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
md: avoid repeated calls to del_gendisk
There is a uaf problem which is found by case 23rdev-lifetime:
Oops: general protection fault, probably for non-canonical address 0xdead000000000122 RIP: 0010:bdi_unregister+0x4b/0x170 Call Trace: __del_gendisk+0x356/0x3e0 mddev_unlock+0x351/0x360 rdev_attr_store+0x217/0x280 kernfs_fop_write_iter+0x14a/0x210 vfs_write+0x29e/0x550 ksys_write+0x74/0xf0 do_syscall_64+0xbb/0x380 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7ff5250a177e
The sequence is:
- rdev remove path gets reconfig_mutex
- rdev remove path release reconfig_mutex in mddev_unlock
- md stop calls do_md_stop and sets MD_DELETED
- rdev remove path calls del_gendisk because MD_DELETED is set
- md stop path release reconfig_mutex and calls del_gendisk again
So there is a race condition we should resolve. This patch adds a flag MD_DO_DELETE to avoid the race condition.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68373.json" }- References
-
- https://git.kernel.org/stable/c/90e3bb44c0a86e245d8e5c6520206fa113acb1ee
- https://git.kernel.org/stable/c/b4c5cf406062ad44cd178269571530c6435b2f3b
- https://git.kernel.org/stable/c/f0fae1debeb9102398ddf2ef69b4f5d395afafed
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68373.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-68373
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git