Answer in brief
CVE-2026-74391 records a Unknown severity vulnerability in tracing: Bound synthetic-field strings with seq_buf. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=02205a6752f223779a1b0e9e8ffacbea6e717851 <0c584c27f6649a93ec12061cc779a4bd8f7c1434 || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <88b901fdc1662b131ff908cbd017333b61e7acc8 || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <baa333b2700a7fa3529d504529c8c10060fd687c || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <cf334620036ad2250e008c7e7bb6646a3938b7b0 || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <f07883450eb14d1cf020b55d9f3a7ec5683bcd26 | 0c584c27f6649a93ec12061cc779a4bd8f7c1434, 88b901fdc1662b131ff908cbd017333b61e7acc8, baa333b2700a7fa3529d504529c8c10060fd687c, cf334620036ad2250e008c7e7bb6646a3938b7b0, f07883450eb14d1cf020b55d9f3a7ec5683bcd26 |
| Linux/Linuxgeneric | 4.17 | Not reported |
| Linux/Linuxgeneric | >=02205a6752f223779a1b0e9e8ffacbea6e717851 <9f8ef2e1e95a42044e614b0a5277e3f53f545135 || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <0c584c27f6649a93ec12061cc779a4bd8f7c1434 || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <88b901fdc1662b131ff908cbd017333b61e7acc8 || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <baa333b2700a7fa3529d504529c8c10060fd687c || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <cf334620036ad2250e008c7e7bb6646a3938b7b0 || >=02205a6752f223779a1b0e9e8ffacbea6e717851 <f07883450eb14d1cf020b55d9f3a7ec5683bcd26 | 9f8ef2e1e95a42044e614b0a5277e3f53f545135, 0c584c27f6649a93ec12061cc779a4bd8f7c1434, 88b901fdc1662b131ff908cbd017333b61e7acc8, baa333b2700a7fa3529d504529c8c10060fd687c, cf334620036ad2250e008c7e7bb6646a3938b7b0, f07883450eb14d1cf020b55d9f3a7ec5683bcd26 |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 30, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: tracing: Bound synthetic-field strings with seq_buf The synthetic field helpers build a prefixed synthetic variable name and a generated hist command in fixed MAX_FILTER_STR_VAL buffers. The current code appends those strings with raw strcat(), so long key lists, field names, or saved filters can run past the end of the staging buffers. Build both strings with seq_buf and propagate -E2BIG if either the synthetic variable name or the generated command exceeds MAX_FILTER_STR_VAL. This keeps the existing tracing-side limit while using the helper intended for bounded command construction. [ sdr: Moved struct seq_buf *s for upside-down x-mas tree formatting ]
Quoted source text, attributed separately from HOL analysis.