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NVD / CVE Program· CNA Linux

CVE-2026-68176: tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev

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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0d5aaf91a3d05f7f993401af27872a5fc0f26edc, 144f29e85702234b23d2a62abf723e6a17eb5427, 201a01102c529772168181190cb084471082cf5c; 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 0d5aaf91a3d05f7f993401af27872a5fc0f26edc, 144f29e85702234b23d2a62abf723e6a17eb5427, 201a01102c529772168181190cb084471082cf5c; 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: tracing: Fix mmiotrace possible NULL dereferencing of hiter->dev If the mmio_pipe_open() fails to find a PCI device, the hiter->dev will be assigned to NULL. The mmiotrace read() function dereferences the hiter->dev if hiter exists. Change the test of the read to not only check hiter being NULL, but also the hiter->dev before dereferencing it.

—No exploit Fix available
Published
Aug 10, 2026
Updated
Aug 19, 2026
EPSS
0.2% · 11th 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 · 0.2%

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  • 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

    • 2.6.27affected
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before c06470320f8156306986a831010cdc9f9f87cb50affected · git
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before 0d5aaf91a3d05f7f993401af27872a5fc0f26edcaffected · git
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before 3635a9e8b453e658a49b39d025f35bbc6e58d0e2affected · git
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before faaf95135184208ee3ac6f33175c8d1800669dfcaffected · git
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before 201a01102c529772168181190cb084471082cf5caffected · git
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before 8464427e1c177809a9488a97dfa2807d9dcf323baffected · git
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before 724cd84b0546c07806840fa658714488553d13a2affected · git
    • f984b51e0779a6dd30feedc41404013ca54e5d05 and later · before 144f29e85702234b23d2a62abf723e6a17eb5427affected · git
    • before 2.6.27not 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-2026-68174Aug 10, 2026 · tracing: Fix union collision of module and refcnt for dynamic events
    0Monitor
  • ← EarlierCVE-2026-68175Aug 10, 2026 · tracing: Fix resource leak on mmiotrace trace_pipe close
    0Monitor
  • Later →CVE-2026-68177Aug 10, 2026 · tracing: Delay module ref count for "enable_event" trigger
    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 Linux0d5aaf91a3d05f7f993401af27872a5fc0f26edcVendor (CNA)
Linux Linux144f29e85702234b23d2a62abf723e6a17eb5427Vendor (CNA)
Linux Linux201a01102c529772168181190cb084471082cf5cVendor (CNA)
Linux Linux3635a9e8b453e658a49b39d025f35bbc6e58d0e2Vendor (CNA)
Linux Linux724cd84b0546c07806840fa658714488553d13a2Vendor (CNA)
Linux Linux8464427e1c177809a9488a97dfa2807d9dcf323bVendor (CNA)
Linux Linuxc06470320f8156306986a831010cdc9f9f87cb50Vendor (CNA)
Linux Linuxfaaf95135184208ee3ac6f33175c8d1800669dfcVendor (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