Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-80831: crypto: mxs-dcp - fix source scatterlist length access

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: 0.16% (FIRST EPSS).
  • Fixed version: Linux Linux 04201dcc88b26eac52f736e39727fc5c420b7257, 0e9edb108a63bbbef952dfcbc597e34ed9c1fb74, 1537bd55b4f842565068c54b47cd2ae1777d5f8f; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 04201dcc88b26eac52f736e39727fc5c420b7257, 0e9edb108a63bbbef952dfcbc597e34ed9c1fb74, 1537bd55b4f842565068c54b47cd2ae1777d5f8f; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 5th 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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-80831

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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

    • 3.14affected
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before fd0f211b27a6ec2ebd8c315683401b43adcc5511affected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before 04201dcc88b26eac52f736e39727fc5c420b7257affected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before e72a795df521cb65b7c4705cc11078cdacfaa2f4affected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before 1537bd55b4f842565068c54b47cd2ae1777d5f8faffected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before da14fae5203b72ca71ccfa9af8de9249e40d533aaffected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before 182f16a20d329a1c818d51dad57d9bf43d356c7caffected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before 0e9edb108a63bbbef952dfcbc597e34ed9c1fb74affected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before 6ef9a4afb52cb102ab038cd42352c142d8505d09affected · git
    • 15b59e7c3733f90ff1f7dd66ad77ae1c90bcdff5 and later · before c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8affected · git

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 6.12.111-1~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-2026-80829Sep 4, 2026 · ALSA: usb-audio: fix OOB write in snd_usbmidi_novation_output()
    0Monitor
  • ← EarlierCVE-2026-80830Sep 4, 2026 · usb: core: Add lock to usb_wakeup_notification()
    0Monitor
  • Later →CVE-2026-80832Sep 4, 2026 · crypto: qce - fix CCM AAD buffer underallocation
    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 Linux04201dcc88b26eac52f736e39727fc5c420b7257Vendor (CNA)
Linux Linux0e9edb108a63bbbef952dfcbc597e34ed9c1fb74Vendor (CNA)
Linux Linux1537bd55b4f842565068c54b47cd2ae1777d5f8fVendor (CNA)
Linux Linux182f16a20d329a1c818d51dad57d9bf43d356c7cVendor (CNA)
Linux Linux6ef9a4afb52cb102ab038cd42352c142d8505d09Vendor (CNA)
Linux Linuxc5bcb084a9871e5b62afb5f48b60adfa13b5d9f8Vendor (CNA)
Linux Linuxda14fae5203b72ca71ccfa9af8de9249e40d533aVendor (CNA)
Linux Linuxe72a795df521cb65b7c4705cc11078cdacfaa2f4Vendor (CNA)
Linux Linuxfd0f211b27a6ec2ebd8c315683401b43adcc5511Vendor (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 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package 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✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (8 more)

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

All records