CVE-2026-53236
tcp: restrict SO_ATTACH_FILTER to priv users
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jun 25, 2026 |
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Affected Versions
Linux / Linux
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3747de241a66ef2c7032d2cc2b826a47c5fa0f6a 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 82b3e7ce10c53fc12aab8904745603efc74f8c07 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < ede69b8f6670600e534591664584f810d7c385f9 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c68517a3e18e20997808821c5559d0cba4d776c1 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 5d39580f68e6ddeedd15e587282207489dfb3da2
Linux / Linux
2.6.12
References
git.kernel.org: https://git.kernel.org/stable/c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a git.kernel.org: https://git.kernel.org/stable/c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba git.kernel.org: https://git.kernel.org/stable/c/82b3e7ce10c53fc12aab8904745603efc74f8c07 git.kernel.org: https://git.kernel.org/stable/c/ede69b8f6670600e534591664584f810d7c385f9 git.kernel.org: https://git.kernel.org/stable/c/c68517a3e18e20997808821c5559d0cba4d776c1 git.kernel.org: https://git.kernel.org/stable/c/5d39580f68e6ddeedd15e587282207489dfb3da2