PT-2025-30839 · Linux+1 · Linux Kernel+1

Published 2025-06-20 · Updated 2025-07-25 · CVE-2025-38432

Positive Technologies (AI Summary)

CVSS v2.0

6.0

Medium

Base vector

AV:L/AC:H/Au:S/C:C/I:C/A:C

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

Description A flaw exists in the Linux kernel's netpoll functionality related to UDP checksum handling. A commit removed the initialization of the UDP checksum field, leading to incorrect checksumming and broken IPv6 transmission when using netpoll. The udph->check field requires initialization before the csum ipv6 magic() function is called.

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

Exploit

Improper Initialization

Weakness Enumeration

CWE-665

Related Identifiers

BDU:2025-09252

CVE-2025-38432

Affected Products

Astra Linux

Linux Kernel

References · 14

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38432.json · Exploit
• https://ubuntu.com/security/CVE-2025-38432 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-38432 · Vendor Advisory
• https://git.kernel.org/stable/c/f5990207026987a353d5a95204c4d9cb725637fd · Patch
• https://cve.org/CVERecord?id=CVE-2025-38432 · Security Note
• https://osv.dev/vulnerability/CVE-2025-38432 · Vendor Advisory
• https://bdu.fstec.ru/vul/2025-09252 · Security Note
• https://git.kernel.org/stable/c/353016ec159f939a380ff6746476a779367ba9a3 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2025-38432 · Security Note
• https://git.kernel.org/linus/f5990207026987a353d5a95204c4d9cb725637fd · Note
• https://twitter.com/CVEnew/status/1948782121306456098 · Twitter Post
• https://access.redhat.com/security/cve/CVE-2025-38432 · Note
• https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git · Note
• https://lore.kernel.org/linux-cve-announce/2025072516-CVE-2025-38432-ce36@gregkh · Note