Answer in brief
CVE-2026-53294 records a High severity (CVSS 7.8) vulnerability in mailbox: mailbox-test: don't free the reused channel. 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 7.8. 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 | >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <fc0089f82c3e36060c2c79156bc2018bfb16b56b || >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <5d4f3d0f64f1016cb78b400a70b67df91fac99b5 || >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <c494a11da45ad7ec9b0ff216c3e3ace351193bb6 || >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <3afca89fae501dbd7421e1777b5b8f033b1d98d0 || >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <5c209299b0113e289e238fa5f2e8f00c59f76060 || >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <82f6dcea46cf5de65c4ba7283f7c7b34de4a324d || >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <240c71a2aea36a1a4210f911a1c32ea88777e8e4 || >=8ea4484d0c2bb4e2152261943fa1a3522654b1c7 <88ebadbf0deefdaccdab868b44ff70a0a257f473 | fc0089f82c3e36060c2c79156bc2018bfb16b56b, 5d4f3d0f64f1016cb78b400a70b67df91fac99b5, c494a11da45ad7ec9b0ff216c3e3ace351193bb6, 3afca89fae501dbd7421e1777b5b8f033b1d98d0, 5c209299b0113e289e238fa5f2e8f00c59f76060, 82f6dcea46cf5de65c4ba7283f7c7b34de4a324d, 240c71a2aea36a1a4210f911a1c32ea88777e8e4, 88ebadbf0deefdaccdab868b44ff70a0a257f473 |
| Linux/Linuxgeneric | 4.4 | Not reported |
Published upstream
Jun 26, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 26, 2026
In the Linux kernel, the following vulnerability has been resolved: mailbox: mailbox-test: don't free the reused channel The RX channel can be aliased to the TX channel if it has a different MMIO. This special case needs to be handled when freeing the channels otherwise a double-free occurs.
Quoted source text, attributed separately from HOL analysis.