PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops
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]
CVE-2025-38069
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2025-38069
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
"lessThan": "761db4ca3a469f2070757acd4e104dff5125ca99",
"versionType": "git"
},
{
"status": "affected",
"version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
"lessThan": "fe2329eff5bee461ebcafadb6ca1df0cbf5945fd",
"versionType": "git"
},
{
"status": "affected",
"version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
"lessThan": "8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee",
"versionType": "git"
},
{
"status": "affected",
"version": "349e7a85b25fa6ee82902d9be2cc5f3bec815120",
"lessThan": "934e9d137d937706004c325fa1474f9e3f1ba10a",
"versionType": "git"
}
],
"programFiles": [
"drivers/pci/endpoint/functions/pci-epf-test.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.31",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.14.9",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/pci/endpoint/functions/pci-epf-test.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-38069
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #45984 · Revision 1
- Added to Heist Feed
- Publisher date