CVE-2025-38587: debian linux — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in fib6_info_uses_dev() fib6_info_uses_dev() seems to rely on RCU without an explicit protection. Like the prior fix in rt6_nlmsg_size(), we need to make sure fib6_del_route() or fib6_add_rt2node() have not removed the anchor from the list, or we risk an infinite loop.

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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-835 CWE-835

Affected Products

Vendor	Product	Versions
linux	linux_kernel	6.1.128 — 6.1.148
linux	linux_kernel	6.6.75 — 6.6.102
linux	linux_kernel	6.11.11 — 6.12
linux	linux_kernel	6.12.2 — 6.12.42
linux	linux_kernel	6.13 — 6.15.10
linux	linux_kernel	6.16 — 6.16.1
debian	debian_linux	All

References

Advisories & Patches

https://git.kernel.org/stable/c/16d21816c0918f8058b5fc14cbe8595d62046e2d https://git.kernel.org/stable/c/9cb6de8ee144a94ae7a40bdb32560329ab7276f0 https://git.kernel.org/stable/c/bc85e62394f008fa848c4ba02c936c735a3e8ef5 https://git.kernel.org/stable/c/db65739d406c72776fbdbbc334be827ef05880d2 https://git.kernel.org/stable/c/e09be457b71b983a085312ff9e981f51e4ed3211 https://git.kernel.org/stable/c/f8d8ce1b515a0a6af72b30502670a406cfb75073

Other References

https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html

Frequently Asked Questions

What is CVE-2025-38587? +

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible infinite loop in fib6_info_uses_dev() fib6_info_uses_dev() seems to rely on RCU without an explicit protection. Like the prior fix in rt6_nlmsg_size(), we need to make sure fib6_del_route() or fib6_add_rt2node() have not removed the anchor from the list, or we risk an infinite loop. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2025-38587? +

CVE-2025-38587 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-2025-38587? +

CVE-2025-38587 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-2025-38587? +

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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CVE-2025-38587