CVE-2026-74313
8.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved:
vduse: hold vduse_lock across IDR lookup in open path
vduse_dev_open() looks up struct vduse_dev through the IDR and then acquires dev->lock only after vduse_lock has been dropped.
This leaves a window where a concurrent VDUSE_DESTROY_DEV can remove the same object from the IDR and free it before the open path locks the device, leading to a use-after-free.
Close this race by keeping vduse_lock held until dev->lock has been acquired in the open path, matching the lock ordering already used by the destroy path.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c8a6153b6c59d95c0e091f053f6f180952ade91e < 35483c5306e09b3190ff937089d404a78012695c | affected |
| Linux | Linux | c8a6153b6c59d95c0e091f053f6f180952ade91e < 5c1560be8aa6849356455af67518d35c551cbd95 | affected |
| Linux | Linux | c8a6153b6c59d95c0e091f053f6f180952ade91e < 93ed4692f2299a40346025979f40e4a9b7b33af7 | affected |
| Linux | Linux | c8a6153b6c59d95c0e091f053f6f180952ade91e < d94e2947203aead590fd63f667d316d4475d65af | affected |
| Linux | Linux | c8a6153b6c59d95c0e091f053f6f180952ade91e < a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2 | affected |
| Linux | Linux | c8a6153b6c59d95c0e091f053f6f180952ade91e < 79e12c891940b0c4c75881b7fd82a8cbb8ac97be | affected |
| Linux | Linux | c8a6153b6c59d95c0e091f053f6f180952ade91e < e440e077748939839d9f76e24383b76b785f80ce | affected |
| Linux | Linux | 5.15 | affected |
| Linux | Linux | 0 < 5.15 | unaffected |
| Linux | Linux | 5.15.212 <= 5.15.* | unaffected |
| Linux | Linux | 6.1.178 <= 6.1.* | unaffected |
| Linux | Linux | 6.6.145 <= 6.6.* | unaffected |
| Linux | Linux | 6.12.97 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.40 <= 6.18.* | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/35483c5306e09b3190ff937089d404a78012695c
- https://git.kernel.org/stable/c/5c1560be8aa6849356455af67518d35c551cbd95
- https://git.kernel.org/stable/c/93ed4692f2299a40346025979f40e4a9b7b33af7
- https://git.kernel.org/stable/c/d94e2947203aead590fd63f667d316d4475d65af
- https://git.kernel.org/stable/c/a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2
- https://git.kernel.org/stable/c/79e12c891940b0c4c75881b7fd82a8cbb8ac97be
- https://git.kernel.org/stable/c/e440e077748939839d9f76e24383b76b785f80ce
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