CVE-2026-64348

Memory leak via failed isochronous submit cleanup

Published Jul 25, 2026 · Updated Jul 25, 2026

Memory leak in USB scheduling in Linux Kernel 2.6.15 through 7.1.1 allows local users to consume kernel memory via failed isochronous submits. EHCI and FOTG210 submit paths retain a staged ehci_iso_sched in urb->hcpriv when done_not_linked runs before endpoint linking, leaving the allocation unfreed. Reachability requires isochronous USB traffic plus controller inaccessibility or an endpoint-link failure; repeated submits increase unreclaimed memory.

CVSS severity3.3
Low
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory leak in USB scheduling in Linux Kernel 2.6.15 through 7.1.1 allows local users to consume kernel memory via failed isochronous submits. EHCI and FOTG210 submit paths retain a staged ehci_iso_sched in urb->hcpriv when done_not_linked runs before endpoint linking, leaving the allocation unfreed. Reachability requires isochronous USB traffic plus controller inaccessibility or an endpoint-link failure; repeated submits increase unreclaimed memory.

The record

CVE
CVE-2026-64348
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.001
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.6.15
  2. Affected versionversion=8de98402652c01839ae321be6cb3054cf5735d83 <4bb88aee6b868cbf73bf453f62497802f5fe4769
  3. Affected versionversion=8de98402652c01839ae321be6cb3054cf5735d83 <6bc17a78a05671d303820224fb37ca339c1dc2cb
  4. Affected versionversion=8de98402652c01839ae321be6cb3054cf5735d83 <8890699eea19027ef6e4f9cbcf27cba5e789793f
  5. Affected versionversion=8de98402652c01839ae321be6cb3054cf5735d83 <b0d00d077f9738d215af9b50c74dffab7a1de19f
  6. Affected versionversion=8de98402652c01839ae321be6cb3054cf5735d83 <b9399d25fbb34a05bbe76eeedd730f62ff2670e9
  7. Affected versionversion=8de98402652c01839ae321be6cb3054cf5735d83 <be5004395dfd0b6ec310db359f887fa396fd0dd2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2.6.15; version=8de98402652c01839ae321be6cb3054cf5735d83 <4bb88aee6b868cbf73bf453f62497802f5fe4769; version=8de98402652c01839ae321be6cb3054cf5735d83 <6bc17a78a05671d303820224fb37ca339c1dc2cb; version=8de98402652c01839ae321be6cb3054cf5735d83 <8890699eea19027ef6e4f9cbcf27cba5e789793f; version=8de98402652c01839ae321be6cb3054cf5735d83 <b0d00d077f9738d215af9b50c74dffab7a1de19f; version=8de98402652c01839ae321be6cb3054cf5735d83 <b9399d25fbb34a05bbe76eeedd730f62ff2670e9; version=8de98402652c01839ae321be6cb3054cf5735d83 <be5004395dfd0b6ec310db359f887fa396fd0dd2

Published CVSS scores

3.3Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.001OS Exhaustion Flood

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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