Improper access control in Linux kernel - CVE-2026-53249
Published: June 26, 2026
Vulnerability identifier: #VU135519
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53249
CWE-ID: CWE-284
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 disclose sensitive information.
The vulnerability exists due to improper access control in ip_options_get() in net/ipv4/ip_options.c when setting IPv4 Loose Source and Record Route or Strict Source and Record Route options. A local user can set crafted IP options to force packets through attacker-controlled nodes to disclose sensitive information.
Exposure depends on network paths that support and forward these IPv4 options.
How to mitigate CVE-2026-53249
Install security update from vendor's repository.
Sources
- https://git.kernel.org/stable/c/00e8845fe3428c69e980dce5071cb3da1d8f7578
- https://git.kernel.org/stable/c/28f5ad1b4055405eb1616e603fe511ba5e3725e7
- https://git.kernel.org/stable/c/2a87c3e8f03ce655ed0ef500d64d5fd924ec3691
- https://git.kernel.org/stable/c/4cd6e9ed49347d3a2fdaaf07e32fb524756dddc2
- https://git.kernel.org/stable/c/89343ff12b3178fc236fe531a3603e7c97c68278
- https://git.kernel.org/stable/c/8ff85dbabbbfb05e86e6cde31d91ac5782179d4d
- https://git.kernel.org/stable/c/a4f3fd6516920988c47ba8d19714985c40c816a1
- https://git.kernel.org/stable/c/d3915a1f5a4bc0ac911032903c3c6ab8df9fcc7c