Answer in brief
CVE-2026-43452 records a High severity (CVSS 8.2) vulnerability in netfilter: x_tables: guard option walkers against 1-byte tail reads. 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 8.2. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <c2a445367a496a3c25dbc940c10c8bd1cfd4c14a || >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <ae1e1267650638136b84c23f2b31250f0ccb6823 || >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <c39f84e4be1be63fc60ca7141ea7b76edcea5907 || >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <9b94f0e42ed248eb31929da84ed9f5310d7ff540 || >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c || >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <bc18551c6169eac5ed813778d3e3e484002dbbe5 || >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <d04800323336eebf441d153f43234eac9b833d36 || >=2e4e6a17af35be359cc8f1c924f8f198fbd478cc <cfe770220ac2dbd3e104c6b45094037455da81d4 | c2a445367a496a3c25dbc940c10c8bd1cfd4c14a, ae1e1267650638136b84c23f2b31250f0ccb6823, c39f84e4be1be63fc60ca7141ea7b76edcea5907, 9b94f0e42ed248eb31929da84ed9f5310d7ff540, 5b18b8b35c7cded2d17b2b2604c9b0694ff48d1c, bc18551c6169eac5ed813778d3e3e484002dbbe5, d04800323336eebf441d153f43234eac9b833d36, cfe770220ac2dbd3e104c6b45094037455da81d4 |
| Linux/Linuxgeneric | 2.6.16 | Not reported |
Published upstream
May 8, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: netfilter: x_tables: guard option walkers against 1-byte tail reads When the last byte of options is a non-single-byte option kind, walkers that advance with i += op[i + 1] ? : 1 can read op[i + 1] past the end of the option area. Add an explicit i == optlen - 1 check before dereferencing op[i + 1] in xt_tcpudp and xt_dccp option walkers.
Quoted source text, attributed separately from HOL analysis.