CVE-2026-53236

In the Linux kernel, the following vulnerability has been resolved: tcp: restrict SO_ATTACH_FILTER to priv users This patch restricts the use of SO_ATTACH_FILTER (cBPF) on TCP sockets to users with CAP_NET_ADMIN capability. This blocks potential side-channel attack where an unprivileged application attaches a filter to leak TCP sequence/acknowledgment numbers.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a	Patch
https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2	Patch
https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07	Patch
https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1	Patch
https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba	Patch
https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9	Patch
https://cert-portal.siemens.com/productcert/html/ssa-019113.html

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:2.6.12:-::::::
	cpe:2.3:o:linux:linux_kernel:2.6.12:rc2::::::
	cpe:2.3:o:linux:linux_kernel:2.6.12:rc3::::::
	cpe:2.3:o:linux:linux_kernel:2.6.12:rc4::::::
	cpe:2.3:o:linux:linux_kernel:2.6.12:rc5::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc4::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc5::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc6::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc7::::::

History

No history.

Information

Published : 2026-06-25 09:16

Updated : 2026-09-08 09:18

NVD link : CVE-2026-53236

Mitre link : CVE-2026-53236

CVE.ORG link : CVE-2026-53236

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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