SB2025090839 - Memory leak in Linux kernel ipv4 netfilter
Published: September 8, 2025
Security Bulletin ID
SB2025090839
Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Memory leak (CVE-ID: CVE-2025-38732)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the nf_send_reset6() and nf_send_unreach6() functions in net/ipv6/netfilter/nf_reject_ipv6.c, within the nf_send_reset() and nf_send_unreach() functions in net/ipv4/netfilter/nf_reject_ipv4.c. A local user can perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/51e8531371f90bee742c63775c9a568e5d6bf3c5
- https://git.kernel.org/stable/c/7b8b503c06274ef3c6c1a107743f1ec0d0a53ef8
- https://git.kernel.org/stable/c/82ef97abf22790182f7d433c74960dfd61b99c33
- https://git.kernel.org/stable/c/91a79b792204313153e1bdbbe5acbfc28903b3a5
- https://git.kernel.org/stable/c/a0a3ace2a57887dac1e7c9a724846040c3e31868
- https://git.kernel.org/stable/c/b32e1590a8d22cf7d7f965e46d5576051acf8e42
- https://git.kernel.org/stable/c/b7a885ba25960c91db237c3f83b4285156789bce