Improper error handling in Linux kernel - CVE-2021-47327
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90938
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-47327
CWE-ID: CWE-388
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper error handling within the arm_smmu_rpm_get() function in drivers/iommu/arm-smmu.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47327
Install update from vendor's website.
Linux kernel - addressed in versions 5.4.134, 5.10.52, 5.12.19, 5.13.4, 5.14
External References
- https://git.kernel.org/stable/c/3761ae0d0e549f2acdaf11f49df4ed06d256b20f
- https://git.kernel.org/stable/c/c4007596fbdabc29f858dc2e1990858a146b60b2
- https://git.kernel.org/stable/c/fbf4daa6f4105e01fbd3868006f65c163365c1e3
- https://git.kernel.org/stable/c/fe92c058199067ae90cf2a901ddf3c271893557a
- https://git.kernel.org/stable/c/1adf30f198c26539a62d761e45af72cde570413d
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.52
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.4
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.134