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NVD / CVE Program· CNA Linux

CVE-2026-97995: virtio_console: do not free control-out buffers on remove

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 177ee901aa2bab02e7f1f8edbb814fd5e386ed62, 2e40c69b9c3448b9c6609cd02013da593b2e123b, 3.17; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 177ee901aa2bab02e7f1f8edbb814fd5e386ed62, 2e40c69b9c3448b9c6609cd02013da593b2e123b, 3.17; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: virtio_console: do not free control-out buffers on remove __send_control_msg() publishes &portdev->cpkt as the control-out virtqueue cookie. remove_vqs() walks every virtqueue and passes leftover cookies to free_buf(), which treats them as struct port_buffer and reads sgpages. If a control message is still on c_ovq when the device is unbound, free_buf() reads past the ports_device object. KASAN reported slab-out-of-bounds in free_buf(): free_buf remove_vqs virtcons_remove unbind_store The object was the ports_device allocated in virtcons_probe(). Drain c_ovq without freeing. The packet lives in portdev and is released with it.

—No exploit Fix available
Published
Sep 25, 2026
Updated
Oct 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%

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  • 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

    • f92b16b815efe8207090a9b5a767618fd89542ca, d2bbfac82b7942afc5d8e564d7087835280df495, a88e13d9a092fbb772d380944b44eb549ef131fe, dd807a784fd36f4136516d5858efb6473dda422c, 47cb14192bcbba3f15b1c3561e05e084e56fdef6, 6b1c41a0f7183702abb7a104c6c7e196ad69a6b3, 9037306163a6ba5587e4b5ca511ac7be4fb7295b, 4.17affected
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before b1f39c2a676698cc64c8e105e08b25111a112ec6affected · git
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before e03522a990cd2e0f1a736eaa349a9df9ab8541c3affected · git
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before 8f6cfc3eca79b8e108d0823756101e2f4f9d811faffected · git
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before 2e40c69b9c3448b9c6609cd02013da593b2e123baffected · git
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before 177ee901aa2bab02e7f1f8edbb814fd5e386ed62affected · git
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before a80c33488e0bbe642ed803b13a4ac8078a70b507affected · git
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before f620c40ea6862feed84deb105568b21ec53a7830affected · git
    • a7a69ec0d8e4a58be7db88d33cbfa2912807bb2b and later · before 894f98e73983f37354214a89a3a7fd35bf9e3072affected · git
    • 3.16.60 and later · before 3.17affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.7-17.2.7-1

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-2026-97993Sep 25, 2026 · vhost-vdpa: don't install the eventfd_ctx_fdget() error in config_ctx
    0Monitor
  • ← EarlierCVE-2026-97994Sep 25, 2026 · vhost/vdpa: reject VRING_NUM larger than device max
    0Monitor
  • Later →CVE-2026-97996Sep 25, 2026 · virtio: fix use-after-free in unregister_virtio_device()
    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 Linux177ee901aa2bab02e7f1f8edbb814fd5e386ed62Vendor (CNA)
Linux Linux2e40c69b9c3448b9c6609cd02013da593b2e123bVendor (CNA)
Linux Linux3.17Vendor (CNA)
Linux Linux3.19Vendor (CNA)
Linux Linux4.10Vendor (CNA)
Linux Linux4.15Vendor (CNA)
Linux Linux4.17Vendor (CNA)
Linux Linux4.2Vendor (CNA)
Linux Linux4.5Vendor (CNA)
Linux Linux894f98e73983f37354214a89a3a7fd35bf9e3072Vendor (CNA)
Linux Linux8f6cfc3eca79b8e108d0823756101e2f4f9d811fVendor (CNA)
Linux Linuxa80c33488e0bbe642ed803b13a4ac8078a70b507Vendor (CNA)
Linux Linuxb1f39c2a676698cc64c8e105e08b25111a112ec6Vendor (CNA)
Linux Linuxe03522a990cd2e0f1a736eaa349a9df9ab8541c3Vendor (CNA)
Linux Linuxf620c40ea6862feed84deb105568b21ec53a7830Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~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.

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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✗ → ✓

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References

Show all references (7 more)

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

All records