Answer in brief
CVE-2026-43453 records a Unknown severity vulnerability in netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop(). 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.
A CVSS score is not reported in the current record. 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 | >=3c4287f62044a90e73a561aa05fc46e62da173da <1957e793196e7f8557374fd4eda53abcbb42e1c0 || >=3c4287f62044a90e73a561aa05fc46e62da173da <57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e || >=3c4287f62044a90e73a561aa05fc46e62da173da <60c1d18781e37bfb96290b86510eb01c5fa24d75 || >=3c4287f62044a90e73a561aa05fc46e62da173da <0a55d62cdb628923d8a21724374a70c76ac7d19d || >=3c4287f62044a90e73a561aa05fc46e62da173da <dfbdac719198778b581bc0dd055df2542edb8c62 || >=3c4287f62044a90e73a561aa05fc46e62da173da <e047f6fbb975f685d6c9fcef95b3b7787a79b46d || >=3c4287f62044a90e73a561aa05fc46e62da173da <324b749aa5b2d516ccfab933df9d3f56e7807f5f || >=3c4287f62044a90e73a561aa05fc46e62da173da <d6d8cd2db236a9dd13dbc2d05843b3445cc964b5 | 1957e793196e7f8557374fd4eda53abcbb42e1c0, 57fb87ca095d5127cd7a27583b8ec43dcf7c9e9e, 60c1d18781e37bfb96290b86510eb01c5fa24d75, 0a55d62cdb628923d8a21724374a70c76ac7d19d, dfbdac719198778b581bc0dd055df2542edb8c62, e047f6fbb975f685d6c9fcef95b3b7787a79b46d, 324b749aa5b2d516ccfab933df9d3f56e7807f5f, d6d8cd2db236a9dd13dbc2d05843b3445cc964b5 |
| Linux/Linuxgeneric | 5.6 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Nov 6, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_pipapo: fix stack out-of-bounds read in pipapo_drop() pipapo_drop() passes rulemap[i + 1].n to pipapo_unmap() as the to_offset argument on every iteration, including the last one where i == m->field_count - 1. This reads one element past the end of the stack-allocated rulemap array (declared as rulemap[NFT_PIPAPO_MAX_FIELDS] with NFT_PIPAPO_MAX_FIELDS == 16). Although pipapo_unmap() returns early when is_last is true without using the to_offset value, the argument is evaluated at the call site before the function body executes, making this a genuine out-of-bounds stack read confirmed by KASAN: BUG: KASAN: stack-out-of-bounds in pipapo_drop+0x50c/0x57c [nf_tables] Read of size 4 at addr ffff8000810e71a4 This frame has 1 object: [32, 160) 'rulemap' The buggy address is at offset 164 -- exactly 4 bytes past the end of the rulemap array. Pass 0 instead of rulemap[i + 1].n on the last iteration to avoid the out-of-bounds read.
Quoted source text, attributed separately from HOL analysis.