VulnerabilityPublished 17 Sep 2026Updated 19 Oct 2026

CVE-2026-93077: Linux kernel · cxl/features: Clamp Get Feature output size to the remaining buffer

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ca95b15a0760e7724e61addbdd61050be13b6406 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 10% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ca95b15a0760e7724e61addbdd61050be13b6406, b8abbd5c2928fd839dab702244cc57b228ab43aa, 2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83

Exploitation evidence

Disclosed: evidence found.
CVE published 17 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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 Linux kernel to ca95b15a0760e7724e61addbdd61050be13b6406, b8abbd5c2928fd839dab702244cc57b228ab43aa or 2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 5e5ac21f629de796ab5d598b59c5e468c6fe4f95, < ca95b15a0760e7724e61addbdd61050be13b6406	Fixed in ca95b15a0760e7724e61addbdd61050be13b6406
LinuxLinux	Affected ≥ 5e5ac21f629de796ab5d598b59c5e468c6fe4f95, < b8abbd5c2928fd839dab702244cc57b228ab43aa	Fixed in b8abbd5c2928fd839dab702244cc57b228ab43aa
LinuxLinux	Affected ≥ 5e5ac21f629de796ab5d598b59c5e468c6fe4f95, < 2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83	Fixed in 2aeb21fe557ef154f0cdf4f9745ebd8d5b31ca83
LinuxLinux	Affected =6.15	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: cxl/features: Clamp Get Feature output size to the remaining buffer cxl_get_feature() reads a feature in a loop but passes a fixed size_out as the output capacity every iteration. On the last partial iteration the buffer has less room left, so a device that returns more than asked can overflow feat_out. Use the per-iter size data_to_rd_size, which already tracks the remaining room, as the output capacity.

References

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