Answer in brief
CVE-2026-43099 records a High severity (CVSS 7.5) vulnerability in ipv4: icmp: fix null-ptr-deref in icmp_build_probe(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystem (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=d329ea5bd8845f0b196bf41b18b6173340d6e0e4 <0f21bc261e60f0c696c58841c4873ff77ed83673 || >=d329ea5bd8845f0b196bf41b18b6173340d6e0e4 <dc5db4db19766a61ad65d81d1f55b1c1e51ba78d || >=d329ea5bd8845f0b196bf41b18b6173340d6e0e4 <47a8bf52156ac7e7a581eca31c1f964ba4258d4d || >=d329ea5bd8845f0b196bf41b18b6173340d6e0e4 <6be325206850a0891896d38bcf83a09d8b54ec48 || >=d329ea5bd8845f0b196bf41b18b6173340d6e0e4 <f91b3ed9e7fa82a70511b5f6901c88379acf2964 || >=d329ea5bd8845f0b196bf41b18b6173340d6e0e4 <5b9911582d441f72fe6ccb15ffe3303bbc07f6f5 || >=d329ea5bd8845f0b196bf41b18b6173340d6e0e4 <fde29fd9349327acc50d19a0b5f3d5a6c964dfd8 | 0f21bc261e60f0c696c58841c4873ff77ed83673, dc5db4db19766a61ad65d81d1f55b1c1e51ba78d, 47a8bf52156ac7e7a581eca31c1f964ba4258d4d, 6be325206850a0891896d38bcf83a09d8b54ec48, f91b3ed9e7fa82a70511b5f6901c88379acf2964, 5b9911582d441f72fe6ccb15ffe3303bbc07f6f5, fde29fd9349327acc50d19a0b5f3d5a6c964dfd8 |
| Linux/Linuxgeneric | 5.13 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
May 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 15, 2026
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".
Quoted source text, attributed separately from HOL analysis.