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
CVSS
5.5
Medium
EPSS
0.1%
p2
KEV
—
Exploit Today
1
0-100
Published: Jun 25, 2026 · Last modified: Oct 15, 2026
0.1%EPSS · 30 days0.1%
2026-09-272026-10-25
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.
- git.kernel.orghttps://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a
- git.kernel.orghttps://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2
- git.kernel.orghttps://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07
- git.kernel.orghttps://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1
- git.kernel.orghttps://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba
- git.kernel.orghttps://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-019113.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-457936.html
- cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-784472.html
No related CVEs by CWE or product.