In the Linux kernel, the following vulnerability has been resolved:
uio: uio_pci_generic_sva: fix double free of devm_kzalloc() memory
uio_pci_sva allocates struct uio_pci_sva_dev with devm_kzalloc() in
probe(), but then calls kfree(udev) both on the probe() error path
(label out_free) and again in remove().
Because devm_kzalloc() allocations are devres-managed and are freed
automatically when the device is detached (including after a failing
probe() and during driver unbind), the explicit kfree() can lead to a
double free.
If probe() fails after devm_kzalloc(), the error path frees udev and
devres cleanup will free it again when the core unwinds the partially
bound device. On normal driver removal, remove() frees udev and devres
will free it again when the device is detached.
This issue was identified by a static analysis tool I developed and
confirmed by manual review. Fix by removing the manual kfree() calls
and dropping the now-unused label.
References
Configurations
Configuration 1 (hide)
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History
30 Oct 2026, 14:30
| Type | Values Removed | Values Added |
|---|---|---|
| CPE | cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc5:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* |
|
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| References | () https://git.kernel.org/stable/c/e344865bfca4eb37ed8d7ac5917226e49fcec7ce - Patch | |
| References | () https://git.kernel.org/stable/c/f74c8696f14149d5e43cc28b015326a759c48f00 - Patch | |
| CWE | CWE-415 |
Information
Published : 2026-07-19 16:17
Updated : 2026-10-30 14:30
NVD link : CVE-2026-63907
Mitre link : CVE-2026-63907
CVE.ORG link : CVE-2026-63907
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-415
Double Free