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CVE-2025-21711: net/rose: prevent integer overflows in rose_setsockopt()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-27 · updated 2026-06-17
• Weakness: CWE-190

Description

In the Linux kernel, the following vulnerability has been resolved: net/rose: prevent integer overflows in rose_setsockopt() In case of possible unpredictably large arguments passed to rose_setsockopt() and multiplied by extra values on top of that, integer overflows may occur. Do the safest minimum and fix these issues by checking the contents of 'opt' and returning -EINVAL if they are too large. Also, switch to unsigned int and remove useless check for negative 'opt' in ROSE_IDLE case.

Affected products

• Linux kernel: from 2.6.12 before 6.1.129; from 6.2 before 6.6.76; from 6.7 before 6.12.13; from 6.13 before 6.13.2 — fixed in 6.1.129, 6.12.13, 6.13.2, 6.6.76

How to fix

Upgrade to a fixed version: Linux kernel 6.1.129, 6.12.13, 6.13.2, 6.6.76. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/352daa50946c3bbb662432e8daf54d6760796589
• https://git.kernel.org/stable/c/4bdd449977e2364a53d0b2a5427e71beb1cd702d
• https://git.kernel.org/stable/c/9bdee49ad6bbd26ab5e13cc6731e54fb1b6c1dca
• https://git.kernel.org/stable/c/b8583b54455cbec2fc038fa32b6700890b369815
• https://git.kernel.org/stable/c/d08f4074f9c69f7e95502587eb1b258a965ba7f0
• https://git.kernel.org/stable/c/d640627663bfe7d8963c7615316d7d4ef60f3b0b
• https://git.kernel.org/stable/c/e5338930a29d0ab2a5af402f5f664aeba0d1a676
• https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
• https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
• https://cert-portal.siemens.com/productcert/html/ssa-265688.html

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