netfilter: nft_inner: release local_lock before re-enabling softirqs (CVE-2026-64150) | HOL Guard CVE

Critical · CVSS 9.8CVE-2026-64150

netfilter: nft_inner: release local_lock before re-enabling softirqs

Answer in brief

CVE-2026-64150 records a Critical severity (CVSS 9.8) vulnerability in netfilter: nft_inner: release local_lock before re-enabling softirqs. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Jul 19, 2026Updated Aug 17, 2026Source checked Sep 21, 2026First seen by HOL Aug 5, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.8
Exploitation: Not marked as known exploited
Affected software: 7 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 9.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:7.1:rc2::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:7.1:rc3::::::	Not reported	Not reported
cpe:2.3:o:linux:linux_kernel:7.1:rc4::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=ba36fada9ab487634f61f92769c95bc148aa8f49 <df19b6af171695a1352314597c9a4311d48d5171 \|\| >=ba36fada9ab487634f61f92769c95bc148aa8f49 <6fecd39c6401134b58505bc4eb1adc8a0e2fe992 \|\| >=ba36fada9ab487634f61f92769c95bc148aa8f49 <a6cb3ff979855f7f0ee9450a947fe8f96c2ba37a	df19b6af171695a1352314597c9a4311d48d5171, 6fecd39c6401134b58505bc4eb1adc8a0e2fe992, a6cb3ff979855f7f0ee9450a947fe8f96c2ba37a
Linux/Linuxgeneric	6.16	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to df19b6af171695a1352314597c9a4311d48d5171 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 5, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_inner: release local_lock before re-enabling softirqs Quoting sashiko: In the error path, local_bh_enable() is called before local_unlock_nested_bh().

Quoted source text, attributed separately from HOL analysis.