High severity7.8NVD Advisory· Published Oct 4, 2025· Updated Jul 30, 2026
CVE-2025-39951
CVE-2025-39951
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
10cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 8 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.5,<5.10.245
- cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:*
- (no CPE)
- (no CPE)range: 5.5
Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/00e98b5a69034b251bb36dc6e7123d7648e218e4nvdPatch
- git.kernel.org/stable/c/14c231959a16ca41bfdcaede72483362a8c645d7nvdPatch
- git.kernel.org/stable/c/4f364023ddcfe83f7073b973a9cb98584b7f2a46nvdPatch
- git.kernel.org/stable/c/5e94e44c9cb30d7a383d8ac227f24a8c9326b770nvdPatch
- git.kernel.org/stable/c/7ebf70cf181651fe3f2e44e95e7e5073d594c9c0nvdPatch
- git.kernel.org/stable/c/aaf900a83508c8cd5cdf765e7749f9076196ec7fnvdPatch
- git.kernel.org/stable/c/c2ff91255e0157b356cff115d8dc3eeb5162edf2nvdPatch
News mentions
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