What’s Vulnerable › Vulnerabilities

CVE-2021-47530: drm/msm: Fix wait_fence submitqueue leak

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-05-24 · updated 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: drm/msm: Fix wait_fence submitqueue leak We weren't dropping the submitqueue reference in all paths. In particular, when the fence has already been signalled. Split out a helper to simplify handling this in the various different return paths.

Affected products

• Linux kernel: from 5.15 before 5.15.7; 5.16-rc1, 5.16-rc2, 5.16-rc3 — fixed in 5.15.7

How to fix

Upgrade to a fixed version: Linux kernel 5.15.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/4c3cdbf2540319ea674f1f3c54f31f14c6f39647
• https://git.kernel.org/stable/c/ea0006d390a28012f8187717aea61498b2b341e5
• https://git.kernel.org/stable/c/4c3cdbf2540319ea674f1f3c54f31f14c6f39647
• https://git.kernel.org/stable/c/ea0006d390a28012f8187717aea61498b2b341e5

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