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TehCorwiz 19 hours ago  [ - ]

It does not behave as described on EndeavorOS (arch-based) running kernel 6.19.14-arch1-1. I receive the error:

Password: su: Authentication token manipulation error

I'm guessing this means it's already patched?

john_strinlai 19 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 19 hours ago  [ - ]

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 19 hours ago  [ - ]

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 17 hours ago  [ - ]

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.

DooMMasteR 9 minutes ago  [ - ]

I mean, most Kernel version literally got the patch 2026.04.30, so just today.

john_strinlai 17 hours ago  [ - ]

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 17 hours ago  [ - ]

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 17 hours ago  [ - ]

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 17 hours ago  [ - ]

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

x4132 13 hours ago  [ - ]

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.

dimastopel 19 hours ago  [ - ]

same result on my arch machine as well.