Linux Kernel up to 6.18.38/7.1.3/7.2-rc1 ALSA capture_urb_complete use after free

CVSS Meta Temp Score
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CTI Interest Score
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7.8$0-$5k0.60

Summaryinfo

A vulnerability was found in Linux Kernel up to 6.18.38/7.1.3/7.2-rc1. It has been rated as very critical. This impacts the function capture_urb_complete of the component ALSA. Performing a manipulation results in use after free. This vulnerability is known as CVE-2026-64601. Attacking locally is a requirement. No exploit is available.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 6.18.38/7.1.3/7.2-rc1. This affects the function capture_urb_complete of the component ALSA. The manipulation with an unknown input leads to a use after free vulnerability. CWE is classifying the issue as CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: ALSA: us144mkii: capture_urb_complete: redundant usb_anchor_urb corrupts anchor list on each resubmission In capture_urb_complete(), usb_anchor_urb() is called on every completion callback, but the URB is already anchored from the initial submission in tascam_trigger_start(). Each redundant call corrupts the anchor's doubly-linked list and inflates the URB refcount. When usb_kill_anchored_urbs() traverses the list during stream stop / suspend / disconnect, the corrupted list leads to use-after-free. Remove the redundant usb_anchor_urb() from the resubmit path.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-64601 since 07/19/2026. The exploitability is told to be easy. An attack has to be approached locally. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/06/2026).

Upgrading to version 6.18.39, 7.1.4 or 7.2-rc2 eliminates this vulnerability. Applying the patch 16f14f55141d4c55c3f321f93c328fff7cd6860a/ab1db64912428cdf06a4f9542e16e0575e9ad59f/5cff1529a2f9b3461a7f5a6e36a86682fc290534 is able to eliminate this problem.

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Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.2
VulDB Meta Temp Score: 7.8

VulDB Base Score: 8.2
VulDB Temp Score: 7.8
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Use after free
CWE: CWE-416 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.18.39/7.1.4/7.2-rc2
Patch: 16f14f55141d4c55c3f321f93c328fff7cd6860a/ab1db64912428cdf06a4f9542e16e0575e9ad59f/5cff1529a2f9b3461a7f5a6e36a86682fc290534

Timelineinfo

07/19/2026 CVE reserved
08/06/2026 +18 days Advisory disclosed
08/06/2026 +0 days VulDB entry created
08/06/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-64601 (🔒)
GCVE (CVE): GCVE-0-2026-64601
GCVE (VulDB): GCVE-100-386505

Entryinfo

Created: 08/06/2026 09:53
Changes: 08/06/2026 09:53 (59)
Complete: 🔍
Cache ID: 216::103

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