USB: iowarrior: fix use-after-free on disconnect race
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 5 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: USB: iowarrior: fix use-after-free on disconnect race mutex_unlock() may access the mutex structure after releasing the lock and therefore cannot be used to manage lifetime of objects directly (unlike spinlocks and refcounts). [1][2] Use a kref to release the driver data to avoid use-after-free in mutex_unlock() when release() races with disconnect(). [1] a51749ab34d9 ("locking/mutex: Document that mutex_unlock() is non-atomic") [2] 2b9d9e0a9ba0 ("locking/mutex: Clarify that mutex_unlock(), and most other sleeping locks, can still use the lock object after it's unlocked")
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 2.6.21 and later | 6.1.191, 6.6.160, 6.12.97, 6.18.58, 7.1.4, 7.2 | Patch available | CNA |
- Linux VendorLinux Affected 2.6.21 and later Fixed in 6.1.191, 6.6.160, 6.12.97, 6.18.58, 7.1.4, 7.2 Patch available CNA
CPE configurations NVD · 10
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 2.6.21.1 to before 6.12.97; 6.13 to before 7.1.4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.21:-:*:*:*:*:*:* | 2.6.21 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.21:rc2:*:*:*:*:*:* | 2.6.21 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.21:rc3:*:*:*:*:*:* | 2.6.21 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.21:rc4:*:*:*:*:*:* | 2.6.21 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.21:rc5:*:*:*:*:*:* | 2.6.21 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.21:rc6:*:*:*:*:*:* | 2.6.21 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:2.6.21:rc7:*:*:*:*:*:* | 2.6.21 rc7 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* | 7.2 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* | 7.2 rc2 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 2.6.21.1 to before 6.12.97; 6.13 to before 7.1.4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.21:-:*:*:*:*:*:* Versions 2.6.21 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.21:rc2:*:*:*:*:*:* Versions 2.6.21 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.21:rc3:*:*:*:*:*:* Versions 2.6.21 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.21:rc4:*:*:*:*:*:* Versions 2.6.21 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.21:rc5:*:*:*:*:*:* Versions 2.6.21 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.21:rc6:*:*:*:*:*:* Versions 2.6.21 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:2.6.21:rc7:*:*:*:*:*:* Versions 2.6.21 rc7 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:* Versions 7.2 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:* Versions 7.2 rc2 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.97, 6.18.58, 7.1.4, 7.2
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet |
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-64341
- 2026-10-03 Alias added: GHSA-jfg4-c35c-vjq6
- 2026-10-21 Fix available: Linux/Linux@30ec3025b771511625375fb3fb959aea3b45fb0d, Linux/Linux@4e7d3c98fed73d3be84d3e146d8d9be0309e725b, Linux/[email protected] +1 · CNA
- 2026-10-21 2 new references · CNA
- 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@9472acd56a020c93be4189d2dba9c743b9fc8039 · CNA
- 2026-10-30 1 new reference · CNA
- 2026-11-06 CISA SSVC decision points changed
References
Patch 3
More Linux Kernel vulnerabilities
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- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2026-64341 · CVE Program
- CVE-2026-64341 · NVD
- FIRST EPSS
- GHSA-jfg4-c35c-vjq6 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-64341 · Red Hat security data · CC BY 4.0
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