CVE-2025-39709: debian linux Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: media: venus: protect against spurious interrupts during probe Make sure the interrupt handler is initialized before the interrupt is registered. If the IRQ is registered before hfi_create(), it's possible that an interrupt fires before the handler setup is complete, leading to a NULL dereference. This error condition has been observed during system boot on Rb3Gen2.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.13 — 5.4.297
linux	linux_kernel	5.5 — 5.10.241
linux	linux_kernel	5.11 — 5.15.190
linux	linux_kernel	5.16 — 6.1.149
linux	linux_kernel	6.2 — 6.6.103
linux	linux_kernel	6.7 — 6.12.44
linux	linux_kernel	6.13 — 6.16.4
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/18c2b2bd982b8546312c9a7895515672169f28e0 https://git.kernel.org/stable/c/3200144a2fa4209dc084a19941b9b203b43580f0 https://git.kernel.org/stable/c/37cc0ac889b018097c217c5929fd6dc2aed636a1 https://git.kernel.org/stable/c/639eb587f977c02423f4762467055b23902b4131 https://git.kernel.org/stable/c/88cf63c2599761c48dec8f618d57dccf8f6f4b53 https://git.kernel.org/stable/c/9db6a78bc5e418e0064e2248c8f3b9b9e8418646 https://git.kernel.org/stable/c/e796028b4835af00d9a38ebbb208ec3a6634702a https://git.kernel.org/stable/c/f54be97bc69b1096198b6717c150dec69f2a1b4d

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html https://cert-portal.siemens.com/productcert/html/ssa-032379.html

Frequently Asked Questions

What is CVE-2025-39709? +

In the Linux kernel, the following vulnerability has been resolved: media: venus: protect against spurious interrupts during probe Make sure the interrupt handler is initialized before the interrupt is registered. If the IRQ is registered before hfi_create(), it's possible that an interrupt fires before the handler setup is complete, leading to a NULL dereference. This error condition has been observed during system boot on Rb3Gen2. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-39709? +

CVE-2025-39709 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2025-39709? +

CVE-2025-39709 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2025-39709? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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