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points

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Disclosure timeline

    2026-03-23Reported to Linux kernel security team
    2026-03-24Initial acknowledgment
    2026-03-25Patches proposed and reviewed
    2026-04-01Patch committed to mainline
    2026-04-22CVE-2026-31431 assigned
    2026-04-29Public disclosure (https://copy.fail/)

kernel 6.19.14-arch1-1, the kernel in question from the parent comment, has been patched.

by marshray16 hours ago|

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The lesson here being... compile your own kernel from git sources every few days?

Give up entirely on non-virtualized container security?

This is not sarcasm. I'd finally given in and started learning about docker/podman-style OCI containerization last week.

by john_strinlai16 hours ago|

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in this specific case, they offer an alternative mitigation if your chosen distro has not updated yet:

For immediate mitigation, block AF_ALG socket creation via seccomp or blacklist the algif_aead module:

    echo "install algif_aead /bin/false" > /etc/modprobe.d/disable-algif-aead.conf
    rmmod algif_aead 2>/dev/null

by marshray16 hours ago|

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Thanks!

I'd do 'umask 133' in front of the echo out of paranoia.

Out of curiosity, was the asterisk after '2>/dev/null' intentional? I had not seen that idiom before.

by john_strinlai16 hours ago|

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the asterisk is my oops, trying to format the comment in italics to differentiate my comment from the text provided by the author. sorry for the confusion

by ranger_danger15 hours ago|

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And I would do chattr +i disable-algif.conf

by x413212 hours ago|

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are you sure containerization would be more secure? this is also a rootless podman escape. the lesson here is to not give random people shell access to your systems.