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NVD / CVE Program· CNA Linux

CVE-2026-80836: crypto: virtio - bound the akcipher result length

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 12c4f29e97f31b013f77ad65ba7daeb02aaa6abe, 1f9f877b1ef1fbd4ee95571cddf39c8002cee252, 3fda114a42f1510a4ec8a0b17a0cfc997952ccc2; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 12c4f29e97f31b013f77ad65ba7daeb02aaa6abe, 1f9f877b1ef1fbd4ee95571cddf39c8002cee252, 3fda114a42f1510a4ec8a0b17a0cfc997952ccc2; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 Release Notes; 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: crypto: virtio - bound the akcipher result length virtio_crypto_dataq_akcipher_callback() sets the result length from the device-reported response length without bounding it to the destination buffer, which was allocated for the original request length. sg_copy_from_buffer() then reads that many bytes from the destination buffer; a backend reporting a larger length over-reads adjacent kernel heap into the caller's scatterlist (an out-of-bounds read). Clamp the reported length to the originally requested destination length. A conforming device reports no more than that, so valid results are unaffected.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 6th 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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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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

    • 5.19affected
    • a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a and later · before e0ffee8adc71a0bc548e5ebc6e021c013a874d79affected · git
    • a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a and later · before bd33cb19bcb432a4dd5e8f50be5e2547af1e9f78affected · git
    • a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a and later · before 12c4f29e97f31b013f77ad65ba7daeb02aaa6abeaffected · git
    • a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a and later · before 5545de5050cbc3594506d74f2c392b0716cf8bcaaffected · git
    • a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a and later · before 3fda114a42f1510a4ec8a0b17a0cfc997952ccc2affected · git
    • a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a and later · before 1f9f877b1ef1fbd4ee95571cddf39c8002cee252affected · git
    • a36bd0ad9fbf69d0d711b1c105954ce8d6cc144a and later · before f77a956f6a19f9463ef1527c9d0cda50dded6b92affected · git
    • before 5.19not affected · semver
    • 6.1.191 and later · up to and including 6.1.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.1.13-17.1.13-1

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-2026-80834Sep 4, 2026 · crypto: sun8i-ce - Remove crypto_rng interface
    0Monitor
  • ← EarlierCVE-2026-80835Sep 4, 2026 · crypto: qcom-rng - Remove crypto_rng interface
    0Monitor
  • Later →CVE-2026-80837Sep 4, 2026 · netfilter: nf_tables: don't queue packet path object notifications
    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 Linux12c4f29e97f31b013f77ad65ba7daeb02aaa6abeVendor (CNA)
Linux Linux1f9f877b1ef1fbd4ee95571cddf39c8002cee252Vendor (CNA)
Linux Linux3fda114a42f1510a4ec8a0b17a0cfc997952ccc2Vendor (CNA)
Linux Linux5545de5050cbc3594506d74f2c392b0716cf8bcaVendor (CNA)
Linux Linuxbd33cb19bcb432a4dd5e8f50be5e2547af1e9f78Vendor (CNA)
Linux Linuxe0ffee8adc71a0bc548e5ebc6e021c013a874d79Vendor (CNA)
Linux Linuxf77a956f6a19f9463ef1527c9d0cda50dded6b92Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
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.

—

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