CVE-2025-68373
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: 1. rdev remove path gets reconfig_mutex 2. rdev remove path release reconfig_mutex in mddev_unlock 3. md stop calls do_md_stop and sets MD_DELETED 4. rdev remove path calls del_gendisk because MD_DELETED is set 5. 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.
Affected versions
Linux kernel versions
6.17
and later are affected. Fixed in
6.17.13,
6.18.2,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2025-68373 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/90e3bb44c0a86e245d8e5c6520206fa113acb1ee
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PatchKernel patch commithttps://git.kernel.org/stable/c/b4c5cf406062ad44cd178269571530c6435b2f3b
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PatchKernel patch commithttps://git.kernel.org/stable/c/f0fae1debeb9102398ddf2ef69b4f5d395afafed
Frequently asked questions
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What is CVE-2025-68373?
CVE-2025-68373 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.17 onward and has been patched in 6.17.13, 6.18.2 and 6.19. CVE-2025-68373 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2025-68373?
Yes — CVE-2025-68373 has been patched. Fixed versions include 6.17.13, 6.18.2 and 6.19. If you are running Linux kernel 6.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2025-68373 actively exploited?
No — CVE-2025-68373 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.