[release/2.3] seccomp: Block AF_ALG in default socket policy#13409
Merged
mxpv merged 2 commits intoMay 14, 2026
Merged
Conversation
Add a comment explaining the purpose of the socket rules and noting that on 32-bit x86, socket() goes through socketcall(2) which is allowed unconditionally, so these arg filters only apply to the direct socket syscall. Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
AF_ALG (address family 38) exposes the Linux kernel crypto API to userspace via socket(2). Containers have no legitimate need for this interface under the default profile, and leaving it accessible widens the kernel attack surface unnecessarily (see https://copy.fail/). Signed-off-by: Paweł Gronowski <pawel.gronowski@docker.com>
AkihiroSuda
approved these changes
May 14, 2026
mxpv
approved these changes
May 14, 2026
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
6 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This is an automated cherry-pick of #13327
/assign AkihiroSuda