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Description

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.

PUBLISHED Reserved 2026-06-09 | Published 2026-06-25 | Updated 2026-06-25 | Assigner Linux

Product status

Default status
unaffected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 3747de241a66ef2c7032d2cc2b826a47c5fa0f6a
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 82b3e7ce10c53fc12aab8904745603efc74f8c07
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before ede69b8f6670600e534591664584f810d7c385f9
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before c68517a3e18e20997808821c5559d0cba4d776c1
affected

1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (git) before 5d39580f68e6ddeedd15e587282207489dfb3da2
affected

Default status
affected

2.6.12
affected

Any version before 2.6.12
unaffected

6.1.176 (semver)
unaffected

6.6.143 (semver)
unaffected

6.12.94 (semver)
unaffected

6.18.36 (semver)
unaffected

7.0.13 (semver)
unaffected

7.1 (original_commit_for_fix)
unaffected

References

git.kernel.org/...c/3747de241a66ef2c7032d2cc2b826a47c5fa0f6a

git.kernel.org/...c/ecfe9171b26ae3eed0cd8bab7a943e9e2c9e51ba

git.kernel.org/...c/82b3e7ce10c53fc12aab8904745603efc74f8c07

git.kernel.org/...c/ede69b8f6670600e534591664584f810d7c385f9

git.kernel.org/...c/c68517a3e18e20997808821c5559d0cba4d776c1

git.kernel.org/...c/5d39580f68e6ddeedd15e587282207489dfb3da2

cve.org (CVE-2026-53236)

nvd.nist.gov (CVE-2026-53236)

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