Bug 2376054 (CVE-2025-38120)

Summary: CVE-2025-38120 kernel: netfilter: nf_set_pipapo_avx2: fix initial map fill
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
Target Milestone: ---   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: ---
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2025-07-03 09:02:36 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_set_pipapo_avx2: fix initial map fill

If the first field doesn't cover the entire start map, then we must zero
out the remainder, else we leak those bits into the next match round map.

The early fix was incomplete and did only fix up the generic C
implementation.

A followup patch adds a test case to nft_concat_range.sh.
Comment 1 Avinash Hanwate 2025-07-03 18:33:06 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025070327-CVE-2025-38120-4498@gregkh/T