VulnerabilityPublished 18 Jun 2025Updated 21 Oct 2026

CVE-2025-38069: Linux kernel · PCI: endpoint: pci-epf-test: Fix double free that causes kernel to oops

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in fe2329eff5bee461ebcafadb6ca1df0cbf5945fd : update Linux kernel when convenient.

Data as of 26 Oct 2026, 15:59 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in fe2329eff5bee461ebcafadb6ca1df0cbf5945fd, 934e9d137d937706004c325fa1474f9e3f1ba10a, 761db4ca3a469f2070757acd4e104dff5125ca99 +1

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Jun 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to fe2329eff5bee461ebcafadb6ca1df0cbf5945fd, 934e9d137d937706004c325fa1474f9e3f1ba10a, 761db4ca3a469f2070757acd4e104dff5125ca99 or 8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 349e7a85b25fa6ee82902d9be2cc5f3bec815120, < fe2329eff5bee461ebcafadb6ca1df0cbf5945fd	Fixed in fe2329eff5bee461ebcafadb6ca1df0cbf5945fd
LinuxLinux	Affected ≥ 349e7a85b25fa6ee82902d9be2cc5f3bec815120, < 934e9d137d937706004c325fa1474f9e3f1ba10a	Fixed in 934e9d137d937706004c325fa1474f9e3f1ba10a
LinuxLinux	Affected ≥ 349e7a85b25fa6ee82902d9be2cc5f3bec815120, < 761db4ca3a469f2070757acd4e104dff5125ca99	Fixed in 761db4ca3a469f2070757acd4e104dff5125ca99
LinuxLinux	Affected ≥ 349e7a85b25fa6ee82902d9be2cc5f3bec815120, < 8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee	Fixed in 8b83893d1f6c6061a7d58169ecdf9d5ee9f306ee
LinuxLinux	Affected =4.12	Fixed in–

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]

References

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