CVE-2026-43099ipv4: icmp: fix null-ptr-deref in icmp_build_probe()
Updated under an hour ago ()
Does this affect you?
It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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".
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before 0f21bc261e60f0c696c58841c4873ff77ed83673; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before dc5db4db19766a61ad65d81d1f55b1c1e51ba78d; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before 47a8bf52156ac7e7a581eca31c1f964ba4258d4d; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before 6be325206850a0891896d38bcf83a09d8b54ec48; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before f91b3ed9e7fa82a70511b5f6901c88379acf2964; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before 5b9911582d441f72fe6ccb15ffe3303bbc07f6f5; from d329ea5bd8845f0b196bf41b18b6173340d6e0e4 before fde29fd9349327acc50d19a0b5f3d5a6c964dfd8 | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 5.13 before 6.6.136; from 6.7 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; 7.0; 7.0; 7.0; 7.0; and 3 more ranges | NVD |
References
- https://git.kernel.org/stable/c/0f21bc261e60f0c696c58841c4873ff77ed83673
- https://git.kernel.org/stable/c/dc5db4db19766a61ad65d81d1f55b1c1e51ba78d
- https://git.kernel.org/stable/c/47a8bf52156ac7e7a581eca31c1f964ba4258d4dpatch
- https://git.kernel.org/stable/c/6be325206850a0891896d38bcf83a09d8b54ec48patch
- https://git.kernel.org/stable/c/f91b3ed9e7fa82a70511b5f6901c88379acf2964patch
- https://git.kernel.org/stable/c/5b9911582d441f72fe6ccb15ffe3303bbc07f6f5patch
- https://git.kernel.org/stable/c/fde29fd9349327acc50d19a0b5f3d5a6c964dfd8patch
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.