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NVD / CVE Program· CNA Linux

CVE-2026-74662: inet: frags: publish queues before arming timer

CriticalCVSS 9.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 39/100)

  • 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: 0.51% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 08a04d7bfb9c103432561aff8a62b6872e694a6a, 39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0, 4.5; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 08a04d7bfb9c103432561aff8a62b6872e694a6a, 39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0, 4.5; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: inet: frags: publish queues before arming timer inet_frag_create() arms the fragment queue timer before inserting the queue into the fqdir rhashtable. If the namespace fragment timeout is zero or negative, the timer can run before the queue is published. The timer callback then marks the queue complete, tries to remove a node that is not in the hash table yet, and drops the anticipated hash reference. Creation can subsequently publish the completed queue without restoring that reference, leaving a stale hash node after the caller drops the remaining reference. Publish the queue first and arm the timer while holding the queue lock. This makes timer expiry wait until the queue is visible in the hash table, so inet_frag_kill() can remove the node and balance the hash reference.

Published
Aug 22, 2026
Updated
Oct 16, 2026
EPSS
0.5% · 44th percentile
CWE
—

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.5%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
9.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-74662

When you'll hear from us

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  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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

    • 493107105843f299662b3b664a83804645564f12, 4.17affected
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before f4e4dab62181b7fe7c011bed6fbef9fc3d48c769affected · git
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before 4ed0681dc2c1e0538b79d2fc56190ffcb369dacdaffected · git
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before 08a04d7bfb9c103432561aff8a62b6872e694a6aaffected · git
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before d3ffb89b2944672cf7bdd8e9ee577d2043b4a956affected · git
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before 39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0affected · git
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before 9f904dd3e455750e5d4ec9b2f134835811b85a2faffected · git
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before 928128865e43b197e30688dc1bc991592c97edcfaffected · git
    • 648700f76b03b7e8149d13cc2bdb3355035258a9 and later · before 653d7ddf6cba867777a3d14c4f83ace008c5ad13affected · git
    • 4.4.174 and later · before 4.5affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.107-16.12.107-1
Debian:14linuxbefore 7.1.9-17.1.9-1

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-2026-74660Aug 22, 2026 · netfilter: ebt_nflog: pin the NFLOG backend
    31Monitor
  • ← EarlierCVE-2026-74661Aug 22, 2026 · mac802154: fix netdev use-after-free in beacon worker
    31Monitor
  • Later →CVE-2026-74663Aug 22, 2026 · net/sched: reject overly deep qdisc hierarchies
    31Monitor

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 Linux08a04d7bfb9c103432561aff8a62b6872e694a6aVendor (CNA)
Linux Linux39c6c4b267b65f00e0b0335a2ae00cbe9e3174f0Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux4ed0681dc2c1e0538b79d2fc56190ffcb369dacdVendor (CNA)
Linux Linux653d7ddf6cba867777a3d14c4f83ace008c5ad13Vendor (CNA)
Linux Linux928128865e43b197e30688dc1bc991592c97edcfVendor (CNA)
Linux Linux9f904dd3e455750e5d4ec9b2f134835811b85a2fVendor (CNA)
Linux Linuxd3ffb89b2944672cf7bdd8e9ee577d2043b4a956Vendor (CNA)
Linux Linuxf4e4dab62181b7fe7c011bed6fbef9fc3d48c769Vendor (CNA)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~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.

No dated events beyond publication.

EPSS, last 120 days

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

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

Not on record for this CVE: patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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.

References

Show all references (7 more)

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

All records