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This Linux kernel vulnerability represents a critical regression in cryptographic handling that allows local privilege escalation, directly impacting the security posture of AI/ML workloads running on vulnerable distributions like Ubuntu and RHEL. The flaw stems from an optimization introduced over a decade ago that corrupted page caches associated with setuid binaries, enabling attackers to inject shellcode into system utilities like `su`. Immediate patching is essential for any infrastructure hosting sensitive models or data, as the attack vector bypasses standard file permissions through memory corruption within the crypto interface.
Source coveringSysdig Blog
What this isA model's reading of the article and related coverage, written for aiqbench. Not the publisher's words.

CVE-2026-31431: “Copy Fail” Linux kernel flaw lets local users gain root in seconds

Sysdig Blog3 min read

On April 29, 2026, CVE-2026-31431 (CVSS 7.8 HIGH), nicknamed “Copy Fail,” was disclosed in the Linux kernel's algif_aead userspace crypto interface. Researchers at Theori demonstrated that an unprivileged local user can corrupt the page cache backing setuid binaries and gain root access within seconds. There are working exploits for Ubuntu 24.04, Amazon Linux 2023, RHEL 10.1, and SUSE 16 kernels. The flaw was introduced in 2017 via commit 72548b093ee3,…

Excerpt shown under the publisher's RSS terms · 69 words · full text and figures are on the publisher's site

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