VulnerabilityPublished 10 Aug 2026Updated 6 Nov 2026

CVE-2026-68365: Linux kernel · USB: serial: io_edgeport: cap received transmit credits

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in faaddd811c5099f11a5f52e68a6b31a5898cda4f : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:19 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 faaddd811c5099f11a5f52e68a6b31a5898cda4f, ee57992c053a6d395e98ced2d4c9cc3b42d8c27a, d9dd87bc1d7e8476d29d68883542ec6198d385c6 +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 ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < faaddd811c5099f11a5f52e68a6b31a5898cda4f	Fixed in faaddd811c5099f11a5f52e68a6b31a5898cda4f
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ee57992c053a6d395e98ced2d4c9cc3b42d8c27a	Fixed in ee57992c053a6d395e98ced2d4c9cc3b42d8c27a
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d9dd87bc1d7e8476d29d68883542ec6198d385c6	Fixed in d9dd87bc1d7e8476d29d68883542ec6198d385c6
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cbe00048b69d67c8a78293cb7681b4c9963b26c7	Fixed in cbe00048b69d67c8a78293cb7681b4c9963b26c7
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 64b687f9694777754285d489abbefa3784bc78da	Fixed in 64b687f9694777754285d489abbefa3784bc78da
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 63c4e55d0741cfaf00515e807cad9293445cd348	Fixed in 63c4e55d0741cfaf00515e807cad9293445cd348

Description

In the Linux kernel, the following vulnerability has been resolved: USB: serial: io_edgeport: cap received transmit credits The interrupt-status packet reports transmit credits returned by the device. edge_interrupt_callback() adds the 16-bit value to txCredits without checking maxTxCredits. edge_write() uses txCredits minus the software FIFO count as the amount of data that fits. Since the FIFO is allocated with maxTxCredits bytes, txCredits exceeding maxTxCredits can cause OOB write in ring buffer. Cap accumulated credits at maxTxCredits. Conforming devices should never hit the cap.

References

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