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▲ john_strinlai 5 hours ago

yes, it was reported on march 23rd, patches on april 1.

you are reading about it now because it has been patched.

▲marshray 4 hours ago | parent [-]

No it hasn't.

Ubuntu before 26.04 LTS (released a week ago) are currently listed as vulnerable.

Debian other than forky and sid are currently listed as vulnerable.

This is a disgrace.

▲john_strinlai 4 hours ago | parent [-]

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.
▲marshray 3 hours ago | parent [-]

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.

▲john_strinlai 3 hours ago | parent [-]

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
▲marshray 2 hours ago | parent [-]

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.

▲john_strinlai 2 hours ago | parent | next [-]

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

▲ranger_danger 2 hours ago | parent | prev [-]

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