um: virtio_uml: Fix use-after-free after put_device in probe
Priority LOW 33CWE-416Published · Updated
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
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: um: virtio_uml: Fix use-after-free after put_device in probe When register_virtio_device() fails in virtio_uml_probe(), the code sets vu_dev->registered = 1 even though the device was not successfully registered. This can lead to use-after-free or other issues.
Why it matters now
EPSS 0.00152 4th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 5.10.245, 5.15.194, 6.1.154 +4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.5 and later | 5.10.245, 5.15.194, 6.1.154, 6.6.108, 6.12.49, 6.16.9, 6.17 | Patch available | CNA |
- Linux VendorLinux Affected 5.5 and later Fixed in 5.10.245, 5.15.194, 6.1.154, 6.6.108, 6.12.49, 6.16.9, 6.17 Patch available CNA
CPE configurations NVD · 7
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 5.5 to before 5.10.245; 5.11 to before 5.15.194; 5.16 to before 6.1.154; 6.2 to before 6.6.108; 6.7 to before 6.12.49; 6.13 to before 6.16.9 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* | 6.17 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* | 6.17 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* | 6.17 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* | 6.17 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* | 6.17 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:* | 6.17 rc6 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 5.5 to before 5.10.245; 5.11 to before 5.15.194; 5.16 to before 6.1.154; 6.2 to before 6.6.108; 6.7 to before 6.12.49; 6.13 to before 6.16.9 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* Versions 6.17 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* Versions 6.17 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* Versions 6.17 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* Versions 6.17 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* Versions 6.17 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:* Versions 6.17 rc6 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.245, 5.15.194, 6.1.154, 6.6.108, 6.12.49, 6.16.9, 6.17
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 5 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2025-39951
- 2026-10-03 Alias added: GHSA-9fvg-5x6h-m5x2
- 2026-11-07 Affected versions changed · Red Hat
References
Patch 7
- https://git.kernel.org/stable/c/14c231959a16ca41bfdcaede72483362a8c645d7
- https://git.kernel.org/stable/c/5e94e44c9cb30d7a383d8ac227f24a8c9326b770
- https://git.kernel.org/stable/c/aaf900a83508c8cd5cdf765e7749f9076196ec7f
- https://git.kernel.org/stable/c/4f364023ddcfe83f7073b973a9cb98584b7f2a46
- https://git.kernel.org/stable/c/00e98b5a69034b251bb36dc6e7123d7648e218e4
- https://git.kernel.org/stable/c/c2ff91255e0157b356cff115d8dc3eeb5162edf2
- https://git.kernel.org/stable/c/7ebf70cf181651fe3f2e44e95e7e5073d594c9c0
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- 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-2025-39951 · CVE Program
- CVE-2025-39951 · NVD
- FIRST EPSS
- GHSA-9fvg-5x6h-m5x2 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-39951 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences