Race Condition The advisory has been revoked - it doesn't affect any version of package kernel-headers (opens in a new tab)
Threat Intelligence
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Test your applications- Snyk IDSNYK-RHEL10-KERNELHEADERS-14580739
- published25 Dec 2025
- disclosed24 Dec 2025
Introduced: 24 Dec 2025
CVE-2025-68373 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:10.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-headers package and not the kernel-headers package as distributed by RHEL.
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: <TASK> __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.
References
- https://bugzilla.redhat.com/show_bug.cgi?id=2424896
- https://access.redhat.com/security/cve/CVE-2025-68373
- https://git.kernel.org/stable/c/90e3bb44c0a86e245d8e5c6520206fa113acb1ee
- https://git.kernel.org/stable/c/b4c5cf406062ad44cd178269571530c6435b2f3b
- https://git.kernel.org/stable/c/f0fae1debeb9102398ddf2ef69b4f5d395afafed