Reachable Assertion in Linux kernel - CVE-2021-47351
Published: June 3, 2024 / Updated: May 14, 2025
Vulnerability identifier: #VU90906
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-2021-47351
CWE-ID: CWE-617
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 reachable assertion within the ubifs_xattr_set(), ubifs_xattr_get(), ubifs_listxattr(), ubifs_purge_xattrs() and ubifs_xattr_remove() functions in fs/ubifs/xattr.c, within the ubifs_alloc_inode() function in fs/ubifs/super.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47351
Install update from vendor's website.
Linux kernel - addressed in versions 5.4.133, 5.10.51, 5.12.18, 5.13.3, 5.14
External References
- https://git.kernel.org/stable/c/7adc05b73d91a5e3d4ca7714fa53ad9b70c53d08
- https://git.kernel.org/stable/c/38dde03eb239605f428f3f1e4baa73d4933a4cc6
- https://git.kernel.org/stable/c/9558612cb829f2c022b788f55d6b8437d5234a82
- https://git.kernel.org/stable/c/c0756f75c22149d20fcb7d8409827cee905eb386
- https://git.kernel.org/stable/c/f4e3634a3b642225a530c292fdb1e8a4007507f5
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.10.51
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.12.18
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.13.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.14
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.133