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NVD / CVE Program· CNA Linux

CVE-2026-74427: afs: Fix netns teardown to cancel the preallocation charger

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: 0.75% (FIRST EPSS); higher than 55.3% of all records.
  • 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 47694fbc9d24ab6bf210f91e8efe06a10a478064, 59e8b7652f6cbfb62d377ead0ad553c1b4e39a7a, 63ccaf1bdf8be2330f47f9b5b233dd3fd04acbd9.

Low priority for now. Upgrade to Linux Linux 47694fbc9d24ab6bf210f91e8efe06a10a478064, 59e8b7652f6cbfb62d377ead0ad553c1b4e39a7a, 63ccaf1bdf8be2330f47f9b5b233dd3fd04acbd9 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: afs: Fix netns teardown to cancel the preallocation charger Fix the teardown of an afs network namespace to make sure it cancels the work item that keeps the preallocated rxrpc call/conn/peer queue charged before incoming calls are disabled (i.e. listen 0). Also, if net->live is false because the afs netns is being deleted, make afs_charge_preallocation() skip charging and make afs_rx_new_call() avoid requeuing the charger. (This was found by AI review).

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Aug 15, 2026
Updated
Oct 16, 2026
EPSS
0.7% · 55th 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 · 0.7%

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-2026-74427

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

    • 4.9affected
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before 63ccaf1bdf8be2330f47f9b5b233dd3fd04acbd9affected · git
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before f5096e18b6b7fbd1c2a1942e275a51bcfdfb2ad1affected · git
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before 59e8b7652f6cbfb62d377ead0ad553c1b4e39a7aaffected · git
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before 85d5fb80fe4f0cc836b6df83f26de204fe102ff7affected · git
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before a33975ff2b6ea47b8f29956403374b1cdd057539affected · git
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before b83ecf80e28afb7b6595ba79932e77ca68a5a83daffected · git
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before eec89c5f8e1adc1de4824042ef75f62aed804153affected · git
    • 00e907127e6f86d0f9b122d9b4347a8aa09a8b61 and later · before 47694fbc9d24ab6bf210f91e8efe06a10a478064affected · git
    • before 4.9not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.100-16.12.100-1
Debian:14linuxbefore 7.1.5-17.1.5-1

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-2026-74417Aug 15, 2026 · drm/radeon: fix integer overflow in radeon_align_pitch()
    31Monitor
  • ← EarlierCVE-2026-74424Aug 15, 2026 · fbcon: fix NULL pointer dereference for a console without vc_data
    0Monitor
  • Later →CVE-2026-74432Aug 15, 2026 · rxrpc: Fix leak of released call in recvmsg(MSG_PEEK)
    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 Linux47694fbc9d24ab6bf210f91e8efe06a10a478064Vendor (CNA)
Linux Linux59e8b7652f6cbfb62d377ead0ad553c1b4e39a7aVendor (CNA)
Linux Linux63ccaf1bdf8be2330f47f9b5b233dd3fd04acbd9Vendor (CNA)
Linux Linux85d5fb80fe4f0cc836b6df83f26de204fe102ff7Vendor (CNA)
Linux Linuxa33975ff2b6ea47b8f29956403374b1cdd057539Vendor (CNA)
Linux Linuxb83ecf80e28afb7b6595ba79932e77ca68a5a83dVendor (CNA)
Linux Linuxeec89c5f8e1adc1de4824042ef75f62aed804153Vendor (CNA)
Linux Linuxf5096e18b6b7fbd1c2a1942e275a51bcfdfb2ad1Vendor (CNA)
debian:linux6.1.180-1 · 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+1% in 7 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).

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