PT-2025-30856 · Linux+1 · Linux Kernel+1

Published 2025-07-04 · Updated 2025-07-25 · CVE-2025-38442

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

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

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

Description A flaw exists in the Linux kernel related to block device handling when Transparent Huge Pages (THP) are disabled. Specifically, the kernel may attempt to process block devices with a logical block size greater than the page size, leading to a null pointer dereference and a potential system panic during boot. This issue arises because large folio support relies on THP, and allowing larger block sizes without THP enabled introduces instability.

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

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

BDU:2025-09222

CVE-2025-38442

Affected Products

Astra Linux

Linux Kernel

References · 16

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38442.json · Exploit
• https://git.kernel.org/stable/c/b025d81b96bfe8a62b6e3e6ac776608206ccbf6d · Patch
• https://osv.dev/vulnerability/CVE-2025-38442 · Vendor Advisory
• https://git.kernel.org/stable/c/4cdf1bdd45ac78a088773722f009883af30ad318 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-38442 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-38442 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-38442 · Security Note
• https://bdu.fstec.ru/vul/2025-09222 · Security Note
• https://ubuntu.com/security/CVE-2025-38442 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2025-38442 · Vendor Advisory
• https://lore.kernel.org/linux-cve-announce/2025072502-CVE-2025-38442-2844@gregkh · Note
• https://cybersecurity-help.cz/vdb/SB2025072739 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://git.kernel.org/linus/4cdf1bdd45ac78a088773722f009883af30ad318 · Note
• https://twitter.com/CVEnew/status/1948782113802911931 · Twitter Post