Improper input validation in Linux kernel - CVE-2026-53235
Published: June 26, 2026
Vulnerability identifier: #VU135525
CSH Severity: Low
CVSS v4.0: 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/E:U/U:Clear
CVE-ID: CVE-2026-53235
CWE-ID: CWE-20
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 attacker to cause a denial of service.
The vulnerability exists due to improper input validation in skb_gro_receive_list() when processing GRO packets with non-linear skb data. A local attacker can trigger the vulnerable code path with a crafted packet state to cause a denial of service.
The issue can occur when an skb arrives via napi_gro_frags() with a zero skb_headlen and a non-zero GRO offset, leading to a BUG_ON condition in __skb_pull().
How to mitigate CVE-2026-53235
Install security update from vendor's repository.