Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops Fix a kernel oops found while testing the stm32_pcie Endpoint driver with handling of PERST# deassertion: During EP initialization, pci_epf_test_alloc_space() allocates all BARs, which are further freed if epc_set_bar() fails (for instance, due to no free inbound window). However, when pci_epc_set_bar() fails, the error path: pci_epc_set_bar() -> pci_epf_free_space() does not clear the previous assignment to epf_test->reg[bar]. Then, if the host reboots, the PERST# deassertion restarts the BAR allocation sequence with the same allocation failure (no free inbound window), creating a double free situation since epf_test->reg[bar] was deallocated and is still non-NULL. Thus, make sure that pci_epf_alloc_space() and pci_epf_free_space() invocations are symmetric, and as such, set epf_test->reg[bar] to NULL when memory is freed. [kwilczynski: commit log]
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 6.12.31 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/8b83893d1f6c6061a7d58169ecdf9d5ee9f306eePatch
- https://git.kernel.org/stable/c/934e9d137d937706004c325fa1474f9e3f1ba10aPatch
- https://git.kernel.org/stable/c/fe2329eff5bee461ebcafadb6ca1df0cbf5945fdPatch
FAQ
What is CVE-2025-38069?
CVE-2025-38069 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops Fix a kernel oops found while testing the stm32_pcie Endpo...
How severe is CVE-2025-38069?
CVE-2025-38069 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2025-38069?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.