PT-2026-34426 · Linux · Linux Kernel

Published 2026-04-22 · Updated 2026-04-22 · CVE-2026-31521

Positive Technologies (AI Summary)

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The module loader fails to verify the bounds of the ELF section index within the simplify symbols() function. A symbol containing an out-of-bounds st shndx value, such as those defined as SHN XINDEX or SHN HIRESERVE, can trigger a kernel panic. This occurs when the module ELF is corrupted or legitimately utilizes SHN XINDEX.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2026-31521

Affected Products

Linux Kernel

References · 10

• https://nvd.nist.gov/vuln/detail/CVE-2026-31521 · Security Note
• https://git.kernel.org/stable/c/5d16f519b6eb1d071807e57efe0df2baa8d32ad6 · Note
• https://git.kernel.org/stable/c/082f15d2887329e0f43fd3727e69365f5bfe5d2c · Note
• https://git.kernel.org/stable/c/ec2b22a58073f80739013588af448ff6e2ab906f · Note
• https://git.kernel.org/stable/c/4bbdb0e48176fd281c2b9a211b110db6fd94e175 · Note
• https://git.kernel.org/stable/c/f9d69d5e7bde2295eb7488a56f094ac8f5383b92 · Note
• https://twitter.com/CVEnew/status/2046979948619903108 · Twitter Post
• https://git.kernel.org/stable/c/ef75dc1401d8e797ee51559a0dd0336c225e1776 · Note
• https://twitter.com/VulmonFeeds/status/2047042904112165328 · Twitter Post
• https://git.kernel.org/stable/c/6ba6957c640f58dc8ef046981a045da43e47ea23 · Note