PT-2026-34368 · Linux · Linux Kernel

Published 2026-04-22 · Updated 2026-04-23 · CVE-2026-31463

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

Description An issue exists in the iomap component where invalid folio access occurs when i blkbits differs from the I/O granularity. In cases where the folio size matches 1 << inode->i blkbits but differs from the I/O granularity, I/O can be submitted for less than the full folio. Consequently, the iomap read folio iter() function fails to invalidate ctx->cur folio, leading iomap read end() to be called on a folio that is still owned by the I/O helper.

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

Related Identifiers

CVE-2026-31463

Affected Products

Linux Kernel

References · 10

• https://cve.org/CVERecord?id=CVE-2026-31463 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2026-31463 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31463 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-31463 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31463 · Vendor Advisory
• https://git.kernel.org/stable/c/4a927f670cdb0def226f9f85f42a9f19d9e09c88 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-31463 · Security Note
• https://git.kernel.org/stable/c/bd71fb3fea9945987053968f028a948997cba8cc · Patch
• https://twitter.com/CVEnew/status/2046980024255779219 · Twitter Post
• https://git.kernel.org/linus/bd71fb3fea9945987053968f028a948997cba8cc · Note