NVD / CVE Program· CNA Linux

CVE-2026-97600: ieee802154: cc2520: fix FIFOP work use-after-free

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: 0.20% (FIRST EPSS).
Fixed version: Linux Linux 4a1ba62a486a4c43af91d01661a95e82dc4aaefa, 56a9919d8494fb118eebf167bef0622528fbf2e7, 890a80d516a1447db5c21bf92841a82914ea897d; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 4a1ba62a486a4c43af91d01661a95e82dc4aaefa, 56a9919d8494fb118eebf167bef0622528fbf2e7, 890a80d516a1447db5c21bf92841a82914ea897d; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes 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: ieee802154: cc2520: fix FIFOP work use-after-free The FIFOP interrupt handler queues cc2520_fifop_irqwork. On removal, cc2520_remove() only flushes the work. The devm-managed FIFOP IRQ remains active until after ->remove() returns and can queue the work again after that flush, allowing it to run after the private data is released. Disable the work with disable_work_sync() instead of flushing it, so the handler can no longer queue it once removal begins. Destroy the buffer mutex last, since the worker and the stop callback invoked through ieee802154_unregister_hw() both take it. Found by an in-house static analysis tool.

—No exploit Fix available

EUVD-2026-86731

Published: Sep 25, 2026
Updated: Oct 21, 2026
EPSS: 0.2% · 9th percentile
CWE: —

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 0 / 40 · —
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

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No public exploit code on record
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.

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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
- 3.17affected
- 0da6bc8cc3417a5e452efb886ff2c61e72b743d6 and later · before 4a1ba62a486a4c43af91d01661a95e82dc4aaefaaffected · git
- 0da6bc8cc3417a5e452efb886ff2c61e72b743d6 and later · before 56a9919d8494fb118eebf167bef0622528fbf2e7affected · git
- 0da6bc8cc3417a5e452efb886ff2c61e72b743d6 and later · before c68fd52c73b676aee67020011e98fea125a978f4affected · git
- 0da6bc8cc3417a5e452efb886ff2c61e72b743d6 and later · before 890a80d516a1447db5c21bf92841a82914ea897daffected · git
- 0da6bc8cc3417a5e452efb886ff2c61e72b743d6 and later · before ff5891b266a7fc6a062710836be84f1cc19338b5affected · git
- before 3.17not affected · semver
- 6.6.160 and later · up to and including 6.6.*not affected · semver
- 6.12.111 and later · up to and including 6.12.*not affected · semver
- 6.18.53 and later · up to and including 6.18.*not affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	from 0	—
Debian:12	linux-6.12	before 6.12.111-1~deb12u1	6.12.111-1~deb12u1
Debian:13	linux	before 6.12.111-1	6.12.111-1
Debian:14	linux	before 7.2.7-1	7.2.7-1

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-2026-97598Sep 25, 2026 · ipv4: fib: bound automatic table ID allocation
0Monitor
← EarlierCVE-2026-97599Sep 25, 2026 · ieee802154: hwsim: serialize pib updates to fix double-free
0Monitor
Later →CVE-2026-97601Sep 25, 2026 · ieee802154: 6lowpan: fix NULL dereference in lowpan_newlink
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 / package	Fixed version	Source
Linux Linux	4a1ba62a486a4c43af91d01661a95e82dc4aaefa	Vendor (CNA)
Linux Linux	56a9919d8494fb118eebf167bef0622528fbf2e7	Vendor (CNA)
Linux Linux	890a80d516a1447db5c21bf92841a82914ea897d	Vendor (CNA)
Linux Linux	c68fd52c73b676aee67020011e98fea125a978f4	Vendor (CNA)
Linux Linux	ff5891b266a7fc6a062710836be84f1cc19338b5	Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0	Release Notes	Microsoft (MSRC)
debian:linux	6.12.111-1 · Debian:13	Package registry (OSV)
debian:linux-6.12	6.12.111-1~deb12u1 · Debian:12	Package 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.

No dated events beyond publication.

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.

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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.

TR-26-1184 · Sep 28, 2026(Linux Kernel Güvenlik Bildirimi)

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

Fix✗ → ✓Sep 28, 2026, 9:54 PM UTC

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

References

git.kernel.org/stable/c/4a1ba62a486a4c43af91d01661a95e82dc4aaefa

Show all references (4 more)

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

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