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NVD / CVE Program· CNA Linux

CVE-2026-68277: drm/dp/mst: fix OOB reads on 2-byte fields in 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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 0bcd7675c69a2462a8531fcd9e4d096e9c7ec5df, 192e146c2d57ad033b0d418ec64ee390f8dc074e, 68a624416d1dd481b3e5b7ea0e8a070a9b8a2c73; 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 0bcd7675c69a2462a8531fcd9e4d096e9c7ec5df, 192e146c2d57ad033b0d418ec64ee390f8dc074e, 68a624416d1dd481b3e5b7ea0e8a070a9b8a2c73; 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 on 2-byte fields in sideband reply parsers Three sideband reply parsers read 16-bit fields as: val = (raw->msg[idx] << 8) | (raw->msg[idx+1]); and check bounds only after the fact. When idx == raw->curlen, raw->msg[idx+1] reads one byte past the received message data into the following struct fields (curchunk_len, curchunk_idx, curlen). Affected functions: - drm_dp_sideband_parse_enum_path_resources_ack() full_payload_bw_number and avail_payload_bw_number fields - drm_dp_sideband_parse_allocate_payload_ack() allocated_pbn field - drm_dp_sideband_parse_query_payload_ack() allocated_pbn field Fix by using a single combined check (idx + 2 > curlen) before each 2-byte read. Since the check is strictly tighter than idx > curlen, no separate step is needed. [added fixes tag]

—No exploit Fix available
Published
Aug 10, 2026
Updated
Nov 6, 2026
EPSS
0.2% · 12th 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%

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

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

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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

    • 3.17affected
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before c1f72a13d54ffd16647d3fa540d961f5deba8790affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 192e146c2d57ad033b0d418ec64ee390f8dc074eaffected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 6e3107e6522109a07fc9bb0fc4ec463f1982e113affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before bdf0508b1e6785d4a8982c637e97e68d60b47d7baffected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 0bcd7675c69a2462a8531fcd9e4d096e9c7ec5dfaffected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before d5c70523cafa26ad2c7a37b612849abe2683baa8affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 68a624416d1dd481b3e5b7ea0e8a070a9b8a2c73affected · git
    • ad7f8a1f9ced7f049f9b66d588723f243a7034cd and later · before 6b89ba3dba2f583626fb693e47e951ffb8bf591faffected · 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-2026-68273Aug 10, 2026 · drm/amdgpu: Fix context pstate override handling
    31Monitor
  • ← EarlierCVE-2026-68274Aug 10, 2026 · drm/xe/guc: Fix buffer overflow in steered register list allocation
    31Monitor
  • Later →CVE-2026-68278Aug 10, 2026 · drm/dp/mst: fix buffer overflows in sideband chunk accumulation
    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 Linux0bcd7675c69a2462a8531fcd9e4d096e9c7ec5dfVendor (CNA)
Linux Linux192e146c2d57ad033b0d418ec64ee390f8dc074eVendor (CNA)
Linux Linux68a624416d1dd481b3e5b7ea0e8a070a9b8a2c73Vendor (CNA)
Linux Linux6b89ba3dba2f583626fb693e47e951ffb8bf591fVendor (CNA)
Linux Linux6e3107e6522109a07fc9bb0fc4ec463f1982e113Vendor (CNA)
Linux Linuxbdf0508b1e6785d4a8982c637e97e68d60b47d7bVendor (CNA)
Linux Linuxc1f72a13d54ffd16647d3fa540d961f5deba8790Vendor (CNA)
Linux Linuxd5c70523cafa26ad2c7a37b612849abe2683baa8Vendor (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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