VulnerabilityPublished 25 Jul 2026Updated 30 Oct 2026

CVE-2026-64348: Linux kernel · usb: free iso schedules on failed submit

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in be5004395dfd0b6ec310db359f887fa396fd0dd2 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 13:33 UTC

Severity

Medium

Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Patch: Available – fixed in be5004395dfd0b6ec310db359f887fa396fd0dd2, b9399d25fbb34a05bbe76eeedd730f62ff2670e9, b0d00d077f9738d215af9b50c74dffab7a1de19f +4

Exploitation evidence

Disclosed: evidence found.
CVE published 25 Jul 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 30 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.
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 ≥ 8de98402652c01839ae321be6cb3054cf5735d83, < be5004395dfd0b6ec310db359f887fa396fd0dd2	Fixed in be5004395dfd0b6ec310db359f887fa396fd0dd2
LinuxLinux	Affected ≥ 8de98402652c01839ae321be6cb3054cf5735d83, < b9399d25fbb34a05bbe76eeedd730f62ff2670e9	Fixed in b9399d25fbb34a05bbe76eeedd730f62ff2670e9
LinuxLinux	Affected ≥ 8de98402652c01839ae321be6cb3054cf5735d83, < b0d00d077f9738d215af9b50c74dffab7a1de19f	Fixed in b0d00d077f9738d215af9b50c74dffab7a1de19f
LinuxLinux	Affected ≥ 8de98402652c01839ae321be6cb3054cf5735d83, < ab12316c4639237cc9d50c80a0c6240f11fbba3f	Fixed in ab12316c4639237cc9d50c80a0c6240f11fbba3f
LinuxLinux	Affected ≥ 8de98402652c01839ae321be6cb3054cf5735d83, < 8890699eea19027ef6e4f9cbcf27cba5e789793f	Fixed in 8890699eea19027ef6e4f9cbcf27cba5e789793f
LinuxLinux	Affected ≥ 8de98402652c01839ae321be6cb3054cf5735d83, < 6bc17a78a05671d303820224fb37ca339c1dc2cb	Fixed in 6bc17a78a05671d303820224fb37ca339c1dc2cb

AI-suggested

The issue has been fixed in multiple Linux kernel commits referenced by their hashes. Systems running affected versions, specifically Linux kernel 2.6.15, should update to a fixed kernel version incorporating these patches. No additional mitigation is required beyond applying the official fixes. Since no runtime testing was performed, users should verify stability after updating.

Description

A memory management vulnerability in the Linux kernel's USB subsystem was identified and fixed. The issue involves a memory leak of isochronous schedules when USB request block (URB) submissions fail before linking to the endpoint queue. This flaw affects the EHCI and FOTG210 USB host controllers. The bug was detected via an experimental analysis tool and confirmed present in Linux kernel version 2.6.15. No runtime testing was performed due to hardware limitations. Multiple commits have fixed the issue.

Impact

The vulnerability causes a memory leak in the Linux kernel's USB subsystem when isochronous URB submissions fail. While this does not directly lead to code execution or privilege escalation, memory leaks can degrade system stability and potentially lead to denial of service conditions over time if exploited repeatedly. There is no evidence of exploitation in the wild. The impact is limited to resource exhaustion in affected systems using EHCI or FOTG210 USB host controllers with isochronous devices.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 30 Oct 2026, 13:33 UTC

Technical details

References

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