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NVD / CVE Program· CNA Linux

CVE-2025-68797: char: applicom: fix NULL pointer dereference in ac_ioctl

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: 0.20% (FIRST EPSS).
  • Fixed version: Linux Linux 0b8b353e09888bccee405e0dd6feafb60360f478, 5a6240804fb7bbd4f5f6e706955248a6f4c1abbc, 74883565c621eec6cd2e35fe6d27454cf2810c23; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1.

Low priority for now. Upgrade to Linux Linux 0b8b353e09888bccee405e0dd6feafb60360f478, 5a6240804fb7bbd4f5f6e706955248a6f4c1abbc, 74883565c621eec6cd2e35fe6d27454cf2810c23; azl3 kernel 6.6.119.3-3 on Azure Linux 3.0 6.6.121.1-1 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: char: applicom: fix NULL pointer dereference in ac_ioctl Discovered by Atuin - Automated Vulnerability Discovery Engine. In ac_ioctl, the validation of IndexCard and the check for a valid RamIO pointer are skipped when cmd is 6. However, the function unconditionally executes readb(apbs[IndexCard].RamIO + VERS) at the end. If cmd is 6, IndexCard may reference a board that does not exist (where RamIO is NULL), leading to a NULL pointer dereference. Fix this by skipping the readb access when cmd is 6, as this command is a global information query and does not target a specific board context.

—No exploit Fix available
Published
Jan 13, 2026
Updated
Jun 17, 2026
EPSS
0.2% · 10th 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%

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 5a6240804fb7bbd4f5f6e706955248a6f4c1abbcaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d1b0452280029d05a98c75631131ee61c0b0d084affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0b8b353e09888bccee405e0dd6feafb60360f478affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before d285517429a75423789e6408653e57b6fdfc8e54affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 74883565c621eec6cd2e35fe6d27454cf2810c23affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f83e3e9f89181b42f6076a115d767a7552c4a39eaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 82d12088c297fa1cef670e1718b3d24f414c23f7affected · git
    • before 2.6.12not affected · semver
    • 5.10.248 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.3-16.18.3-1

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-2025-68792Jan 13, 2026 · tpm2-sessions: Fix out of range indexing in name_size
    31Monitor
  • ← EarlierCVE-2025-68796Jan 13, 2026 · f2fs: fix to avoid updating zero-sized extent in extent cache
    0Monitor
  • Later →CVE-2025-68799Jan 13, 2026 · caif: fix integer underflow in cffrml_receive()
    32Monitor

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 Linux0b8b353e09888bccee405e0dd6feafb60360f478Vendor (CNA)
Linux Linux5a6240804fb7bbd4f5f6e706955248a6f4c1abbcVendor (CNA)
Linux Linux74883565c621eec6cd2e35fe6d27454cf2810c23Vendor (CNA)
Linux Linux82d12088c297fa1cef670e1718b3d24f414c23f7Vendor (CNA)
Linux Linuxd1b0452280029d05a98c75631131ee61c0b0d084Vendor (CNA)
Linux Linuxd285517429a75423789e6408653e57b6fdfc8e54Vendor (CNA)
Linux Linuxf83e3e9f89181b42f6076a115d767a7552c4a39eVendor (CNA)
azl3 kernel 6.6.119.3-3 on Azure Linux 3.06.6.121.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.162-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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

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✗ → ✓

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References

Show all references (6 more)

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

All records