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CVE-2026-74313

HIGHCVSS 8.8/10EPSS 0.17%

Last modified

CVE-2026-74313 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.8/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
0.17%

7.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= c8a6153b6c59d95c0e091f053f6f180952ade91e, < 35483c5306e09b3190ff937089d404a78012695c; >= c8a6153b6c59d95c0e091f053f6f180952ade91e, < 5c1560be8aa6849356455af67518d35c551cbd95; >= c8a6153b6c59d95c0e091f053f6f180952ade91e, < 93ed4692f2299a40346025979f40e4a9b7b33af7; >= c8a6153b6c59d95c0e091f053f6f180952ade91e, < d94e2947203aead590fd63f667d316d4475d65af; >= c8a6153b6c59d95c0e091f053f6f180952ade91e, < a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2; >= c8a6153b6c59d95c0e091f053f6f180952ade91e, < 79e12c891940b0c4c75881b7fd82a8cbb8ac97be; >= c8a6153b6c59d95c0e091f053f6f180952ade91e, < e440e077748939839d9f76e24383b76b785f80ce
LinuxLinux5.15

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74313?
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.
How severe is CVE-2026-74313?
CVE-2026-74313 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2026-74313?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST