Input validation error in Linux kernel - CVE-2023-53366
Published: September 18, 2025 / Updated: September 22, 2025
Vulnerability identifier: #VU115809
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-2023-53366
CWE-ID: CWE-20
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 input validation within the EXPORT_SYMBOL() and iocb_bio_iopoll() functions in block/blk-core.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2023-53366
Install update from vendor's repository.
Linux kernel - addressed in versions 6.1.16, 6.2.3, 6.3
External References
- https://git.kernel.org/stable/c/0510d5e654d05053ed0e6309a9b42043ac9903ab
- https://git.kernel.org/stable/c/1af0bdca03f367874da45d6cbe05fa05b90b1439
- https://git.kernel.org/stable/c/310726c33ad76cebdee312dbfafc12c1b44bf977
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.16
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.2.3
- https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.3