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Hotfix CVE-2026-31431#27

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danielzgtg wants to merge 1 commit intolinux-surface:masterfrom
danielzgtg:fix/CVE-2026-31431
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Hotfix CVE-2026-31431#27
danielzgtg wants to merge 1 commit intolinux-surface:masterfrom
danielzgtg:fix/CVE-2026-31431

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@danielzgtg
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@danielzgtg danielzgtg commented Apr 30, 2026

I'm hotfixing this in surface-control because the kernel builds haven't been working for weeks.

This hotfixes an escalation-to-root kernel vulnerability.

Apparently Fedora has it built into the kernel, so this modprobe hotfix won't work. A GRUB initcall_blacklist=algif_aead_init is needed.

Fixes: linux-surface/linux-surface#2090

@danielzgtg danielzgtg marked this pull request as draft April 30, 2026 08:56
@danielzgtg danielzgtg marked this pull request as ready for review April 30, 2026 08:58
I'm hotfixing this in surface-control because the kernel builds haven't
been working for weeks.

This hotfixes an escalation-to-root kernel vulnerability.

Apparently Fedora has it built into the kernel, so this modprobe hotfix
won't work. A GRUB `initcall_blacklist=algif_aead_init` is needed.

Fixes: linux-surface/linux-surface#2090
@danielzgtg
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I need help for the Fedora version. https://www.reddit.com/r/sysadmin/comments/1szajkx/copy_fail_cve202631431_is_a_trivially_exploitable/oj0m0bi/ says it's built into the kernel and we should use initcall_blacklist=algif_aead_init in GRUB. But I don't know whether Fedora has a drop-in file for GRUB.

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Superseded. See parent issue

@danielzgtg danielzgtg closed this Apr 30, 2026
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Kernel escalation-to-root CVE-2026-31431

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