PT-2026-61128 · Linux · Linux Kernel

CVE-2026-63812 · Published 2026-07-19 · Updated 2026-07-19

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:L/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 f2fs file system within the destroy extent node() function. When the FI NO EXTENT inode flag is set, the system fails to reset the length of the largest extent to 0 and update the inode folio. Because subsequent modifications to the extent tree are prohibited, the cached largest extent can become stale, potentially leading to incorrect extent information and sanity check errors.

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

Related Identifiers

CVE-2026-63812

Affected Products

Linux Kernel

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-63812 · Security Note
• https://git.kernel.org/stable/c/edf12cbeeeabe799bd2ee21fdb5c336cce6fbad7 · Note
• https://git.kernel.org/stable/c/58a5deb220bcac4c73bf58954c0845644c997487 · Note
• https://twitter.com/VulmonFeeds/status/2078889469751517485 · Twitter Post
• https://git.kernel.org/stable/c/1f70ddb28a3c71df124da5fa4040c808116d6bb9 · Note
• https://git.kernel.org/stable/c/20190e498057997532c7f186d081011f18e0a462 · Note
• https://git.kernel.org/stable/c/7e4d8f98be63f98856a5176b9188dada6e7ba9ee · Note