Description
In the Linux kernel, the following vulnerability has been resolved: ipv4: icmp: fix null-ptr-deref in icmp_build_probe() ipv6_stub->ipv6_dev_find() may return ERR_PTR(-EAFNOSUPPORT) when the IPv6 stack is not active (CONFIG_IPV6=m and not loaded), and passing this error pointer to dev_hold() will cause a kernel crash with null-ptr-deref. Instead, silently discard the request. RFC 8335 does not appear to define a specific response for the case where an IPv6 interface identifier is syntactically valid but the implementation cannot perform the lookup at runtime, and silently dropping the request may safer than misreporting "No Such Interface".
Affected products
linux: linux kernel
References8
- git.kernel.org/stable/c/47a8bf52156ac7e7a581eca31c1f964ba4258d4d Patch
- git.kernel.org/stable/c/5b9911582d441f72fe6ccb15ffe3303bbc07f6f5 Patch
- git.kernel.org/stable/c/6be325206850a0891896d38bcf83a09d8b54ec48 Patch
- git.kernel.org/stable/c/f91b3ed9e7fa82a70511b5f6901c88379acf2964 Patch
- git.kernel.org/stable/c/fde29fd9349327acc50d19a0b5f3d5a6c964dfd8 Patch
- git.kernel.org/stable/c/0f21bc261e60f0c696c58841c4873ff77ed83673
- git.kernel.org/stable/c/dc5db4db19766a61ad65d81d1f55b1c1e51ba78d
- cert-portal.siemens.com/productcert/html/ssa-784472.html
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 43 · as of 13 November 2026
- CWE
- CWE-476
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