Improper Check for Unusual or Exceptional Conditions in Linux kernel - CVE-2026-53353
Published: July 2, 2026
Vulnerability identifier: #VU136692
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53353
CWE-ID: CWE-754
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper handling of a missing internal state in hsr_addr_is_self() when processing packets during device teardown. A local user can send packets through an HSR device during the teardown window to cause a kernel warning.
The issue occurs in a window where the device remains discoverable after self_node has been cleared.
How to mitigate CVE-2026-53353
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/0232b6fcb7615fb7fecfe0727a23065a53e228b8
- https://git.kernel.org/stable/c/271355c2ef6171dbc815e7ae653eed63444bbd58
- https://git.kernel.org/stable/c/66a46e22396fd5d09606f37f73643eb20e99aa42
- https://git.kernel.org/stable/c/afd0f17ca46258cec3a5cc48b8df9327fe772490
- https://git.kernel.org/stable/c/d71bb171661ec0225bf4babdd4d296d744982fb3