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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98624: netfilter: nfnetlink_queue: hold nfnl mutex in event notifier

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1, 1d1184411599a7c2217560bab3bbe641c6d03b95, 2e9be1302f25c9be51c2fb8c907bc6d8a1050e33; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1, 1d1184411599a7c2217560bab3bbe641c6d03b95, 2e9be1302f25c9be51c2fb8c907bc6d8a1050e33; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: netfilter: nfnetlink_queue: hold nfnl mutex in event notifier We must serialize the release notifier and the config netlink function. A concurrent thread can issue close() which can call the release function while unrelated socket processes UNBIND request for same portid: Oops: general protection fault, [..] RIP: 0010:__instance_destroy+0x60/0x210 [nfnetlink_queue] Call Trace: nfqnl_recv_config+0x9b0/0xdc0 [nfnetlink_queue] nfnetlink_rcv_msg+0x7c2/0xeb0 ? __pfx_nfnetlink_rcv_msg+0x10/0x10 After this, parallel UNBIND and URELEASE events are impossible. This change isn't nice, but its the shortest fix given instances are not refcounted and the nfnetlink config callback drops the rcu read lock early due to need for sleeping allocations.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 2.6.14affected
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before 46432f2e76f7c385d82506304a2928e7d293289faffected · git
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before 597320337c3da06c92a9e95cfc755da66fedc476affected · git
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before 2e9be1302f25c9be51c2fb8c907bc6d8a1050e33affected · git
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before d559e06a5ab7c064100aafd5c826eadd0f1c6216affected · git
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before 1d1184411599a7c2217560bab3bbe641c6d03b95affected · git
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before 07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1affected · git
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before 8137a39e08e838ced234044384740ceeb99ed388affected · git
    • 7af4cc3fa158ff1dda6e7451c7e6afa6b0bb85cb and later · before 9461613afc59acef44a0071b0dd5075f6e993ffeaffected · git
    • before 2.6.14not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.9-17.2.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98622Oct 18, 2026 · net/sched: act_ct: don't WARN on benign flow_offload_alloc() failure
    0Monitor
  • ← EarlierCVE-2026-98623Oct 18, 2026 · drm/nouveau/clk: fix list cursor use after loop in nvkm_clk_ustate_update
    0Monitor
  • Later →CVE-2026-98625Oct 18, 2026 · netfilter: flowtable: publish HW_DEAD after worker is done
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux07a3ec8fdc5a1267c00cd6fd1cf8bbb5cda913c1Vendor (CNA)
Linux Linux1d1184411599a7c2217560bab3bbe641c6d03b95Vendor (CNA)
Linux Linux2e9be1302f25c9be51c2fb8c907bc6d8a1050e33Vendor (CNA)
Linux Linux46432f2e76f7c385d82506304a2928e7d293289fVendor (CNA)
Linux Linux597320337c3da06c92a9e95cfc755da66fedc476Vendor (CNA)
Linux Linux8137a39e08e838ced234044384740ceeb99ed388Vendor (CNA)
Linux Linux9461613afc59acef44a0071b0dd5075f6e993ffeVendor (CNA)
Linux Linuxd559e06a5ab7c064100aafd5c826eadd0f1c6216Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.159.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 9, 2026+22 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records