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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-38732 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_reject: don't leak dst refcount for loopback packets recent patches to add a WARN() when replacing skb dst entry found an old bug: WARNING: include/linux/skbuff.h:1165 skb_dst_check_unset include/linux/skbuff.h:1164 [inline] WARNING: include/linux/skbuff.h:1165 skb_dst_set include/linux/skbuff.h:1210 [inline] WARNING: include/linux/skbuff.h:1165 nf_reject_fill_skb_dst+0x2a4/0x330 net/ipv4/netfilter/nf_reject_ipv4.c:234 [..] Call Trace: nf_send_unreach+0x17b/0x6e0 net/ipv4/netfilter/nf_reject_ipv4.c:325 nft_reject_inet_eval+0x4bc/0x690 net/netfilter/nft_reject_inet.c:27 expr_call_ops_eval net/netfilter/nf_tables_core.c:237 [inline] .. This is because blamed commit forgot about loopback packets. Such packets already have a dst_entry attached, even at PRE_ROUTING stage. Instead of checking hook just check if the skb already has a route attached to it.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-032379.html siemens-SADP
https://git.kernel.org/stable/c/51e8531371f90bee742c63775c9a568e5d6bf3c5 kernel.org Patch 
https://git.kernel.org/stable/c/7b8b503c06274ef3c6c1a107743f1ec0d0a53ef8 kernel.org Patch 
https://git.kernel.org/stable/c/82ef97abf22790182f7d433c74960dfd61b99c33 kernel.org Patch 
https://git.kernel.org/stable/c/91a79b792204313153e1bdbbe5acbfc28903b3a5 kernel.org Patch 
https://git.kernel.org/stable/c/a0a3ace2a57887dac1e7c9a724846040c3e31868 kernel.org Patch 
https://git.kernel.org/stable/c/b32e1590a8d22cf7d7f965e46d5576051acf8e42 kernel.org Patch 
https://git.kernel.org/stable/c/b7a885ba25960c91db237c3f83b4285156789bce kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html CVE Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html CVE Mailing List  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-Other Other cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-38732
NVD Published Date:
09/05/2025
NVD Last Modified:
05/12/2026
Source:
kernel.org