CVE-2025-38069PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops
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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
- 7.8 HIGH (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 21, 2026
Affected products
Linux Linux linux:linux (from the name) | from 349e7a85b25fa6ee82902d9be2cc5f3bec815120 before 761db4ca3a469f2070757acd4e104dff5125ca99; from 349e7a85b25fa6ee82902d9be2cc5f3bec815120 before fe2329eff5bee461ebcafadb6ca1df0cbf5945fd; 349e7a85b25fa6ee82902d9be2cc5f3bec815120 builds before 8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee; from 349e7a85b25fa6ee82902d9be2cc5f3bec815120 before 934e9d137d937706004c325fa1474f9e3f1ba10a | CNA record |
linux linux_kernel linux:linux_kernel | before 6.12.31; from 6.13 before 6.14.9 | NVD |
References
- https://git.kernel.org/stable/c/761db4ca3a469f2070757acd4e104dff5125ca99
- https://git.kernel.org/stable/c/fe2329eff5bee461ebcafadb6ca1df0cbf5945fdpatch
- https://git.kernel.org/stable/c/8b83893d1f6c6061a7d58169ecdf9d5ee9f306eepatch
- https://git.kernel.org/stable/c/934e9d137d937706004c325fa1474f9e3f1ba10apatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.