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NVD / CVE Program· CNA Linux

CVE-2026-74730: NFS: Pin the 'struct nfs_server' during a FREE_STATEID call

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 80ed3d762628b36c9e4b22fac7c65b72ef3b13dd, af62f1af182d33a0de38308c012841885d8ab92e, caee6a68ffaa5016dfc01cd0b3dc1896a32e3abd; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 80ed3d762628b36c9e4b22fac7c65b72ef3b13dd, af62f1af182d33a0de38308c012841885d8ab92e, caee6a68ffaa5016dfc01cd0b3dc1896a32e3abd; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.152.1-1 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: NFS: Pin the 'struct nfs_server' during a FREE_STATEID call Dan Aloni reports that he was able to hit a use-after-free bug if a FREE_STATEID operation gets delayed for whatever reason. Fix this by bumping the refcount of the 'struct nfs_server' object for the duration of the FREE_STATEID so it doesn't get cleaned up from underneath us while operations are still in flight.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Aug 22, 2026
Updated
Oct 16, 2026
EPSS
0.5% · 43th 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-2026-74730

When you'll hear from us

  • when it enters CISA KEV
  • 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

    • 3.10affected
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before ed2f92ce2fc48463c41e0e540b9a3454889e8af8affected · git
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before d858ab09e787106432d4d9830bad9dfedf02f890affected · git
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before af62f1af182d33a0de38308c012841885d8ab92eaffected · git
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before caee6a68ffaa5016dfc01cd0b3dc1896a32e3abdaffected · git
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before ed1161ab6239761958b38d5667225634fc2be894affected · git
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before d71dfffa512e71b166a889484e4c3b148a9a3af2affected · git
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before 80ed3d762628b36c9e4b22fac7c65b72ef3b13ddaffected · git
    • 7c1d5fae4a87d3cf3e9ffd68bcdbaf6529013009 and later · before cf616096a0f3a2b60f7d68b6b39674a6867ded9caffected · git
    • before 3.10not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.105-16.12.105-1
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-2026-74728Aug 22, 2026 · xfs: handle NULL b_addr in xfs_buf_free
    0Monitor
  • ← EarlierCVE-2026-74729Aug 22, 2026 · soc: aspeed: lpc-snoop: Fix usercopy overflow in snoop_file_read
    0Monitor
  • Later →CVE-2026-74731Aug 22, 2026 · sched_ext: Skip sub-disable teardown for never-linked sub-schedulers
    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 Linux80ed3d762628b36c9e4b22fac7c65b72ef3b13ddVendor (CNA)
Linux Linuxaf62f1af182d33a0de38308c012841885d8ab92eVendor (CNA)
Linux Linuxcaee6a68ffaa5016dfc01cd0b3dc1896a32e3abdVendor (CNA)
Linux Linuxcf616096a0f3a2b60f7d68b6b39674a6867ded9cVendor (CNA)
Linux Linuxd71dfffa512e71b166a889484e4c3b148a9a3af2Vendor (CNA)
Linux Linuxd858ab09e787106432d4d9830bad9dfedf02f890Vendor (CNA)
Linux Linuxed1161ab6239761958b38d5667225634fc2be894Vendor (CNA)
Linux Linuxed2f92ce2fc48463c41e0e540b9a3454889e8af8Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.152.1-1 · 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).

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

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.

Change log

  1. SSVC exploitation— → 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