CVE-2025-38618
CVE-2025-38618 is a high-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-416.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- EPSS exploit prediction: 0% (5th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2025-26085
- Weakness: CWE-416
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: vsock: Do not allow binding to VMADDR_PORT_ANY It is possible for a vsock to autobind to VMADDR_PORT_ANY. This can cause a use-after-free when a connection is made to the bound socket. The socket returned by accept() also has port VMADDR_PORT_ANY but is not on the list of unbound sockets. Binding it will result in an extra refcount decrement similar to the one fixed in fcdd2242c023 (vsock: Keep the binding until socket destruction). Modify the check in __vsock_bind_connectible() to also prevent binding to VMADDR_PORT_ANY.
Frequently asked questions
- What is CVE-2025-38618?
- In the Linux kernel, the following vulnerability has been resolved: vsock: Do not allow binding to VMADDR_PORT_ANY It is possible for a vsock to autobind to VMADDR_PORT_ANY. This can cause a use-after-free when a connection is made to the bound socket. The socket returned by accept() also has port VMADDR_PORT_ANY but is not on the list of unbound sockets. Binding it will result in an extra refcount decrement similar to the one fixed in fcdd2242c023 (vsock: Keep the binding until socket destruction). Modify the check in __vsock_bind_connectible() to also prevent binding to VMADDR_PORT_ANY.
- How severe is CVE-2025-38618?
- CVE-2025-38618 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2025-38618 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (5th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2025-38618?
- CVE-2025-38618 primarily affects Linux Linux Kernel. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2025-38618?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2025-38618 have an EU (EUVD) identifier?
- Yes. CVE-2025-38618 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2025-26085.
- When was CVE-2025-38618 published?
- CVE-2025-38618 was published on 2025-08-22 and last updated on 2026-06-17.
References
- https://git.kernel.org/stable/c/32950b1907919be86a7a2697d6f93d57068b3865
- https://git.kernel.org/stable/c/44bd006d5c93f6a8f28b106cbae2428c5d0275b7
- https://git.kernel.org/stable/c/8f01093646b49f6330bb2d36761983fd829472b1
- https://git.kernel.org/stable/c/aba0c94f61ec05315fa7815d21aefa4c87f6a9f4
- https://git.kernel.org/stable/c/c04a2c1ca25b9b23104124d3b2d349d934e302de
- https://git.kernel.org/stable/c/cf86704798c1b9c46fa59dfc2d662f57d1394d79
- https://git.kernel.org/stable/c/d1a5b1964cef42727668ac0d8532dae4f8c19386
- https://git.kernel.org/stable/c/d73960f0cf03ef1dc9e96ec7a20e538accc26d87
- https://git.kernel.org/stable/c/f138be5d7f301fddad4e65ec66dfc3ceebf79be3
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Affected products (3)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
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