Unknown

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

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]

Published Aug 10, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.18%

ahead of 8% of scored CVEs · Oct 30, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < 185de1d74e658e2edb723ba76fa61903f77d8a68≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < c2fbda0fe0163c55ba3820ee6cea0c6b43622eda≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < 22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < 04d953f50d61e542e94a5977822cc53735f8c0ce≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < 533d9e2bede4aeefdc2a0561d7071cfede95958f≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < e6ef5455b06cb4e5d181aabcd723791587c79f12≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd and < 1a8f537f5a1eeac941f262fe73078d6b08ba83c0 and 1 more version 3.17	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 30, 2026 · 15 reading(s) · max 0.18%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 10, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/185de1d74e658e2edb723ba76fa61903f77d8a68
NIST National Vulnerability Database
git.kernel.org/stable/c/04d953f50d61e542e94a5977822cc53735f8c0ce
NIST National Vulnerability Database
git.kernel.org/stable/c/1a8f537f5a1eeac941f262fe73078d6b08ba83c0
NIST National Vulnerability Database
git.kernel.org/stable/c/533d9e2bede4aeefdc2a0561d7071cfede95958f
NIST National Vulnerability Database
git.kernel.org/stable/c/22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2
NIST National Vulnerability Database
git.kernel.org/stable/c/e6ef5455b06cb4e5d181aabcd723791587c79f12
NIST National Vulnerability Database
git.kernel.org/stable/c/d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586
NIST National Vulnerability Database
git.kernel.org/stable/c/c2fbda0fe0163c55ba3820ee6cea0c6b43622eda
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 2d
Unknown CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 2d
Unknown CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 2d
Unknown CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation 2d
Unknown CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 2d
Unknown CVE-2026-99210 accel/rocket: clear rdev on device init failure 2d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-68279 is "drm/dp/mst: fix OOB reads in remote DPCD/I2C sideband reply parsers", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.18% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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