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NVD / CVE Program· CNA Linux

CVE-2026-68279: drm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers

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: 0.18% (FIRST EPSS).
  • Fixed version: Linux Linux 04d953f50d61e542e94a5977822cc53735f8c0ce, 185de1d74e658e2edb723ba76fa61903f77d8a68, 1a8f537f5a1eeac941f262fe73078d6b08ba83c0; 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 04d953f50d61e542e94a5977822cc53735f8c0ce, 185de1d74e658e2edb723ba76fa61903f77d8a68, 1a8f537f5a1eeac941f262fe73078d6b08ba83c0; 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: drm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers drm_dp_sideband_parse_remote_dpcd_read() reads num_bytes from the raw message and then unconditionally does: memcpy(bytes, &raw->msg[idx], num_bytes); without checking that idx + num_bytes <= raw->curlen. raw->msg[] is 256 bytes; if a malicious or misbehaving MST hub sets num_bytes larger than the remaining payload, the memcpy reads past the received data into whatever follows in raw->msg[]. drm_dp_sideband_parse_remote_i2c_read_ack() has the same flaw (noted with a /* TODO check */ comment since the code was introduced). Fix both functions by using a single combined check (idx + num_bytes > curlen) before each memcpy. Since num_bytes is u8, it is always >= 0, so this strictly subsumes the simpler idx > curlen form and no separate step is needed. [added missing fixes tag]

—No exploit Fix available
Published
Aug 10, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 8th 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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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

    • 3.17affected
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 185de1d74e658e2edb723ba76fa61903f77d8a68affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before c2fbda0fe0163c55ba3820ee6cea0c6b43622edaaffected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 04d953f50d61e542e94a5977822cc53735f8c0ceaffected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 533d9e2bede4aeefdc2a0561d7071cfede95958faffected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before e6ef5455b06cb4e5d181aabcd723791587c79f12affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 1a8f537f5a1eeac941f262fe73078d6b08ba83c0affected · git
    • before 3.17not 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-2026-68277Aug 10, 2026 · drm/dp/mst: fix OOB reads on 2-byte fields in sideband reply parsers
    0Monitor
  • ← EarlierCVE-2026-68278Aug 10, 2026 · drm/dp/mst: fix buffer overflows in sideband chunk accumulation
    0Monitor
  • Later →CVE-2026-68284Aug 10, 2026 · bpf, sockmap: Fix cork use-after-free in tcp_bpf_sendmsg()
    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 Linux04d953f50d61e542e94a5977822cc53735f8c0ceVendor (CNA)
Linux Linux185de1d74e658e2edb723ba76fa61903f77d8a68Vendor (CNA)
Linux Linux1a8f537f5a1eeac941f262fe73078d6b08ba83c0Vendor (CNA)
Linux Linux22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2Vendor (CNA)
Linux Linux533d9e2bede4aeefdc2a0561d7071cfede95958fVendor (CNA)
Linux Linuxc2fbda0fe0163c55ba3820ee6cea0c6b43622edaVendor (CNA)
Linux Linuxd7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586Vendor (CNA)
Linux Linuxe6ef5455b06cb4e5d181aabcd723791587c79f12Vendor (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. SSVC exploitation— → none
  2. 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.

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