PT-2025-49726 · Ext4+1 · Ext4+1

Published 2023-01-01 · Updated 2025-12-09 · CVE-2023-53835

Positive Technologies (AI Summary)

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

Description A flaw exists in the Linux kernel related to the ext4 filesystem. Specifically, when a filesystem mounted as read-only is remounted as read-write, clearing the SB RDONLY flag prematurely, before quota initialization, can lead to a warning message and potential issues if another process is attempting to create a directory. This can trigger a warning in the ext4 xattr block set() function. The issue occurs when attempting to set extended attributes during directory creation.

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

Exploit

Related Identifiers

CVE-2023-53835

Affected Products

Linux Kernel

Ext4

References · 12

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/53xxx/CVE-2023-53835.json · Exploit
• https://osv.dev/vulnerability/CVE-2023-53835 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-53835 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2023-53835 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2023-53835 · Vendor Advisory
• https://twitter.com/CVEnew/status/1998225381862871502 · Twitter Post
• https://git.kernel.org/stable/c/a44be64bbecb15a452496f60db6eacfee2b59c79 · Note
• https://git.kernel.org/stable/c/c53936d9fb35287ed81ec412a5b494729268a64d · Note
• https://git.kernel.org/stable/c/cd2341c26fb6cf45445de70cfd01022cb634746b · Note
• https://git.kernel.org/stable/c/5570ac70264021c3a9b0c55e0e6d7a90f25cebbc · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/stable/c/5c87115520d2451f5689be7d9a463450d5b1bd96 · Note