Answer in brief
CVE-2026-46234 records a Unknown severity vulnerability in vsock: fix buffer size clamping order. 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.
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), 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 | >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca || >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <caf11dfea5233a69298a1c448bbf8d1639c80536 || >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <01ef69785dc3162f588a361ab770b1e312800188 || >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <a998a7e250bf976539e05a00ec64a81292afecaa || >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <310da27932dd0afe7ce7456dfe1f0814c3301f41 || >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <2602f7bb5818e92315feeaeb71d8ce4d5c9ab160 || >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <0b68881501460c3761f196469e1e503218c5e536 || >=b9f2b0ffde0c9b666b2b1672eb468b8f805a9b97 <d114bfdc9b76bf93b881e195b7ec957c14227bab | f6ec135941d2c1c2dbb87b5ce1783f4f6ac6ccca, caf11dfea5233a69298a1c448bbf8d1639c80536, 01ef69785dc3162f588a361ab770b1e312800188, a998a7e250bf976539e05a00ec64a81292afecaa, 310da27932dd0afe7ce7456dfe1f0814c3301f41, 2602f7bb5818e92315feeaeb71d8ce4d5c9ab160, 0b68881501460c3761f196469e1e503218c5e536, d114bfdc9b76bf93b881e195b7ec957c14227bab |
| Linux/Linuxgeneric | 5.5 | Not reported |
| Siemens/SIMATIC S7-1500 TM MFP - GNU/Linux subsystemgeneric | >=0 <* | * |
Published upstream
May 28, 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: vsock: fix buffer size clamping order In vsock_update_buffer_size(), the buffer size was being clamped to the maximum first, and then to the minimum. If a user sets a minimum buffer size larger than the maximum, the minimum check overrides the maximum check, inverting the constraint. This breaks the intended socket memory boundaries by allowing the vsk->buffer_size to grow beyond the configured vsk->buffer_max_size. Fix this by checking the minimum first, and then the maximum. This ensures the buffer size never exceeds the buffer_max_size.
Quoted source text, attributed separately from HOL analysis.