{"id":"CVE-2026-53294","title":"mailbox: mailbox-test: don't free the reused channel","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mailbox-test: don't free the reused channel\n\nThe RX channel can be aliased to the TX channel if it has a different\nMMIO. This special case needs to be handled …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < fc0089f82c3e36060c2c79156bc2018bfb16b56b","Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 5d4f3d0f64f1016cb78b400a70b67df91fac99b5","Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < c494a11da45ad7ec9b0ff216c3e3ace351193bb6","Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 3afca89fae501dbd7421e1777b5b8f033b1d98d0","Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 5c209299b0113e289e238fa5f2e8f00c59f76060","Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 82f6dcea46cf5de65c4ba7283f7c7b34de4a324d","Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 240c71a2aea36a1a4210f911a1c32ea88777e8e4","Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 88ebadbf0deefdaccdab868b44ff70a0a257f473","Linux 4.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:25:48.586283Z"},"published":"2026-06-26","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:34:18.789Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53294","references":[{"url":"https://git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b"},{"url":"https://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5"},{"url":"https://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6"},{"url":"https://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0"},{"url":"https://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060"},{"url":"https://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d"},{"url":"https://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4"},{"url":"https://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473"}],"tags":["cve.org"],"epss":0.00176,"epssPercentile":0.0712,"ingestedAt":"2026-11-06T16:57:43.254Z","slug":"CVE-2026-53294","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nmailbox: mailbox-test: don't free the reused channel\n\nThe RX channel can be aliased to the TX channel if it has a different\nMMIO. This special case needs to be handled when freeing the channels\notherwise a double-free occurs.\n\n## Affected\n\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < fc0089f82c3e36060c2c79156bc2018bfb16b56b`\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 5d4f3d0f64f1016cb78b400a70b67df91fac99b5`\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < c494a11da45ad7ec9b0ff216c3e3ace351193bb6`\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 3afca89fae501dbd7421e1777b5b8f033b1d98d0`\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 5c209299b0113e289e238fa5f2e8f00c59f76060`\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 82f6dcea46cf5de65c4ba7283f7c7b34de4a324d`\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 240c71a2aea36a1a4210f911a1c32ea88777e8e4`\n- `Linux >= 8ea4484d0c2bb4e2152261943fa1a3522654b1c7 < 88ebadbf0deefdaccdab868b44ff70a0a257f473`\n- `Linux 4.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}