VulnerabilityPublished 10 Aug 2026Updated 6 Nov 2026

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

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in e6ef5455b06cb4e5d181aabcd723791587c79f12 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in e6ef5455b06cb4e5d181aabcd723791587c79f12, d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586, c2fbda0fe0163c55ba3820ee6cea0c6b43622eda +5

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd, < e6ef5455b06cb4e5d181aabcd723791587c79f12	Fixed in e6ef5455b06cb4e5d181aabcd723791587c79f12
LinuxLinux	Affected ≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd, < d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586	Fixed in d7b9b1e33b4ed8c48d4db6e6e21c257ebbbb2586
LinuxLinux	Affected ≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd, < c2fbda0fe0163c55ba3820ee6cea0c6b43622eda	Fixed in c2fbda0fe0163c55ba3820ee6cea0c6b43622eda
LinuxLinux	Affected ≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd, < 533d9e2bede4aeefdc2a0561d7071cfede95958f	Fixed in 533d9e2bede4aeefdc2a0561d7071cfede95958f
LinuxLinux	Affected ≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd, < 185de1d74e658e2edb723ba76fa61903f77d8a68	Fixed in 185de1d74e658e2edb723ba76fa61903f77d8a68
LinuxLinux	Affected ≥ ad7f8a1f9ced7f049f9b66d588723f243a7034cd, < 22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2	Fixed in 22d9f7fc1aaabaf73d5f30e8b0c9aa814ecd6ed2

Description

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]

References

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