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NVD / CVE Program· CNA Linux

CVE-2026-68357: watchdog: pretimeout: Fix UAF in watchdog_unregister_governor()

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 0ca252720f0e38411cfec3431db9bb1aed0a412c, 2e47b91b9b4020fcc01def14d6b6556d66074cf4, 472ec1e34ff0bb26379805cae808f658cce58c35; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0ca252720f0e38411cfec3431db9bb1aed0a412c, 2e47b91b9b4020fcc01def14d6b6556d66074cf4, 472ec1e34ff0bb26379805cae808f658cce58c35; azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 6.6.150.1-1 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: watchdog: pretimeout: Fix UAF in watchdog_unregister_governor() When a watchdog governor is unregistered, it updates existing watchdog devices that were using this governor by falling back to `default_gov`. If the governor being unregistered is currently set as `default_gov`, the `default_gov` is never cleared. This leads to 2 use-after-free issues: 1. New watchdog devices registered after this point will inherit the dangling `default_gov`. 2. Existing watchdog devices using the unregistered governor will have their `wdd->gov` reassigned to the dangling `default_gov`. Fix the UAF by clearing `default_gov` if it matches the governor being unregistered.

—No exploit Fix available
Published
Aug 10, 2026
Updated
Aug 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%

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

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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
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before b9ae33faa96bdec6bc60e4c5f8f53786182e4207affected · git
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before 472ec1e34ff0bb26379805cae808f658cce58c35affected · git
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before 7a2ee3ec6f208307eca1119a343c7b5d39c03708affected · git
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before 2e47b91b9b4020fcc01def14d6b6556d66074cf4affected · git
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before 0ca252720f0e38411cfec3431db9bb1aed0a412caffected · git
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before 7d1658b066de30f4b23afc14814d22416a971e6eaffected · git
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before 7993d626983cc58fbde9607333cfd2d57725c197affected · git
    • da0d12ff2b829a35e9921918e925d79497b82bef and later · before 7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661affected · 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 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.101-1~deb12u16.12.101-1~deb12u1
Debian:13linuxbefore 6.12.101-16.12.101-1
Debian:14linuxbefore 7.1.6-17.1.6-1

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-2026-68347Aug 10, 2026 · iommu/amd: Fix IRQ unsafe locking in gdom allocation
    0Monitor
  • ← EarlierCVE-2026-68356Aug 10, 2026 · watchdog: airoha: Prevent division by zero when clock frequency is zero
    0Monitor
  • Later →CVE-2026-68358Aug 10, 2026 · hwmon: (nzxt-kraken3) Stop device IO before calling hid_hw_stop
    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 Linux0ca252720f0e38411cfec3431db9bb1aed0a412cVendor (CNA)
Linux Linux2e47b91b9b4020fcc01def14d6b6556d66074cf4Vendor (CNA)
Linux Linux472ec1e34ff0bb26379805cae808f658cce58c35Vendor (CNA)
Linux Linux7362ba0f9c96ac3ad6a2ca3995bd9fc9a28a8661Vendor (CNA)
Linux Linux7993d626983cc58fbde9607333cfd2d57725c197Vendor (CNA)
Linux Linux7a2ee3ec6f208307eca1119a343c7b5d39c03708Vendor (CNA)
Linux Linux7d1658b066de30f4b23afc14814d22416a971e6eVendor (CNA)
Linux Linuxb9ae33faa96bdec6bc60e4c5f8f53786182e4207Vendor (CNA)
azl3 kernel 6.6.143.1-1 on Azure Linux 3.06.6.150.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.101-1~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

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. 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