Vulnerability details
CVE-2026-43099
Linux LinuxSiemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
ipv4: icmp: fix null-ptr-deref in icmp_build_probe()
CVSS 3.1
7.5High
Official 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".
CVSS scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.5High | 3.1 | CVEProject cvelistV5 (CNA) (Linux) | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| Linux | Linux | 5.13 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d329ea5bd8845f0b196bf41b18b6173340d6e0e4 ≤ v < dc5db4db19766a61ad65d81d1f55b1c1e51ba78d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d329ea5bd8845f0b196bf41b18b6173340d6e0e4 ≤ v < 47a8bf52156ac7e7a581eca31c1f964ba4258d4d | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d329ea5bd8845f0b196bf41b18b6173340d6e0e4 ≤ v < 6be325206850a0891896d38bcf83a09d8b54ec48 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d329ea5bd8845f0b196bf41b18b6173340d6e0e4 ≤ v < f91b3ed9e7fa82a70511b5f6901c88379acf2964 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d329ea5bd8845f0b196bf41b18b6173340d6e0e4 ≤ v < 5b9911582d441f72fe6ccb15ffe3303bbc07f6f5 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d329ea5bd8845f0b196bf41b18b6173340d6e0e4 ≤ v < fde29fd9349327acc50d19a0b5f3d5a6c964dfd8 | CVEProject cvelistV5 (CNA) |
| Linux | Linux | d329ea5bd8845f0b196bf41b18b6173340d6e0e4 ≤ v < 0f21bc261e60f0c696c58841c4873ff77ed83673 | CVEProject cvelistV5 (CNA) |
| Siemens | SIMATIC S7-1500 TM MFP - GNU/Linux subsystem | All | CVEProject cvelistV5 (CNA) |
References and advisories
8- https://git.kernel.org/stable/c/0f21bc261e60f0c696c58841c4873ff77ed83673
- https://git.kernel.org/stable/c/dc5db4db19766a61ad65d81d1f55b1c1e51ba78d
- https://git.kernel.org/stable/c/47a8bf52156ac7e7a581eca31c1f964ba4258d4d
- https://git.kernel.org/stable/c/6be325206850a0891896d38bcf83a09d8b54ec48
- https://git.kernel.org/stable/c/f91b3ed9e7fa82a70511b5f6901c88379acf2964
- https://git.kernel.org/stable/c/5b9911582d441f72fe6ccb15ffe3303bbc07f6f5
- https://git.kernel.org/stable/c/fde29fd9349327acc50d19a0b5f3d5a6c964dfd8
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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Details
- Published
- 2026-05-06
- Last updated
- 2026-10-15
- State
- Published
- Assigner (CNA)
- Linux
Exploit prediction (EPSS)
0.5%
Probability of exploitation in 30 days
43.1%
Percentile (among all CVEs)
Weaknesses (CWE)
- —