Answer in brief
CVE-2026-43341 records a Critical severity (CVSS 9.8) vulnerability in net/ipv6: ioam6: prevent schema length wraparound in trace fill. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-43341 records a Critical severity (CVSS 9.8) vulnerability in net/ipv6: ioam6: prevent schema length wraparound in trace fill. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (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 9.8. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8c6f6fa6772696be0c047a711858084b38763728 <d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2 || >=8c6f6fa6772696be0c047a711858084b38763728 <e96d48b37708d53cbdc47f6f60b0714fc4a5f596 || >=8c6f6fa6772696be0c047a711858084b38763728 <d1b041080086e91d3733a5438a8c51ad5d3d8e09 || >=8c6f6fa6772696be0c047a711858084b38763728 <77695a69baca9b99d95fad09fc78c2318736604f || >=8c6f6fa6772696be0c047a711858084b38763728 <184d2e9db27c0f76226b5cad16fe29510a5d2280 || >=8c6f6fa6772696be0c047a711858084b38763728 <d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d || >=8c6f6fa6772696be0c047a711858084b38763728 <5e67ba9bb531e1ec6599a82a065dea9040b9ce50 | d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2, e96d48b37708d53cbdc47f6f60b0714fc4a5f596, d1b041080086e91d3733a5438a8c51ad5d3d8e09, 77695a69baca9b99d95fad09fc78c2318736604f, 184d2e9db27c0f76226b5cad16fe29510a5d2280, d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d, 5e67ba9bb531e1ec6599a82a065dea9040b9ce50 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: net/ipv6: ioam6: prevent schema length wraparound in trace fill ioam6_fill_trace_data() stores the schema contribution to the trace length in a u8. With bit 22 enabled and the largest schema payload, sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the remaining-space check. __ioam6_fill_trace_data() then positions the write cursor without reserving the schema area but still copies the 4-byte schema header and the full schema payload, overrunning the trace buffer. Keep sclen in an unsigned int so the remaining-space check and the write cursor calculation both see the full schema length.
Quoted source text, attributed separately from HOL analysis.
CVSS is 9.8. 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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=8c6f6fa6772696be0c047a711858084b38763728 <d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2 || >=8c6f6fa6772696be0c047a711858084b38763728 <e96d48b37708d53cbdc47f6f60b0714fc4a5f596 || >=8c6f6fa6772696be0c047a711858084b38763728 <d1b041080086e91d3733a5438a8c51ad5d3d8e09 || >=8c6f6fa6772696be0c047a711858084b38763728 <77695a69baca9b99d95fad09fc78c2318736604f || >=8c6f6fa6772696be0c047a711858084b38763728 <184d2e9db27c0f76226b5cad16fe29510a5d2280 || >=8c6f6fa6772696be0c047a711858084b38763728 <d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d || >=8c6f6fa6772696be0c047a711858084b38763728 <5e67ba9bb531e1ec6599a82a065dea9040b9ce50 | d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2, e96d48b37708d53cbdc47f6f60b0714fc4a5f596, d1b041080086e91d3733a5438a8c51ad5d3d8e09, 77695a69baca9b99d95fad09fc78c2318736604f, 184d2e9db27c0f76226b5cad16fe29510a5d2280, d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d, 5e67ba9bb531e1ec6599a82a065dea9040b9ce50 |
| Linux/Linuxgeneric | 5.15 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 19, 2026
In the Linux kernel, the following vulnerability has been resolved: net/ipv6: ioam6: prevent schema length wraparound in trace fill ioam6_fill_trace_data() stores the schema contribution to the trace length in a u8. With bit 22 enabled and the largest schema payload, sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the remaining-space check. __ioam6_fill_trace_data() then positions the write cursor without reserving the schema area but still copies the 4-byte schema header and the full schema payload, overrunning the trace buffer. Keep sclen in an unsigned int so the remaining-space check and the write cursor calculation both see the full schema length.
Quoted source text, attributed separately from HOL analysis.