{"id":"CVE-2026-53294","state":"PUBLISHED","title":"mailbox: mailbox-test: don't free the reused channel","description":"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 when freeing the channels\notherwise a double-free occurs.","publishedAt":"2026-06-26T19:40:52.927Z","updatedAt":"2026-06-26T19:40:52.927Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"fc0089f82c3e36060c2c79156bc2018bfb16b56b","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"5d4f3d0f64f1016cb78b400a70b67df91fac99b5","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"c494a11da45ad7ec9b0ff216c3e3ace351193bb6","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"3afca89fae501dbd7421e1777b5b8f033b1d98d0","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"5c209299b0113e289e238fa5f2e8f00c59f76060","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"82f6dcea46cf5de65c4ba7283f7c7b34de4a324d","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"240c71a2aea36a1a4210f911a1c32ea88777e8e4","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"88ebadbf0deefdaccdab868b44ff70a0a257f473","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/mailbox-test.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/mailbox-test.c"]}],"references":["https://git.kernel.org/stable/c/fc0089f82c3e36060c2c79156bc2018bfb16b56b","https://git.kernel.org/stable/c/5d4f3d0f64f1016cb78b400a70b67df91fac99b5","https://git.kernel.org/stable/c/c494a11da45ad7ec9b0ff216c3e3ace351193bb6","https://git.kernel.org/stable/c/3afca89fae501dbd7421e1777b5b8f033b1d98d0","https://git.kernel.org/stable/c/5c209299b0113e289e238fa5f2e8f00c59f76060","https://git.kernel.org/stable/c/82f6dcea46cf5de65c4ba7283f7c7b34de4a324d","https://git.kernel.org/stable/c/240c71a2aea36a1a4210f911a1c32ea88777e8e4","https://git.kernel.org/stable/c/88ebadbf0deefdaccdab868b44ff70a0a257f473"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/53xxx/CVE-2026-53294.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-53294","state":"PUBLISHED","datePublished":"2026-06-26T19:40:52.927Z","dateUpdated":"2026-06-26T19:40:52.927Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-06-09T07:44:35.396Z"},"containers":{"cna":{"title":"mailbox: mailbox-test: don't free the reused channel","descriptions":[{"lang":"en","value":"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 when freeing the channels\notherwise a double-free occurs."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"fc0089f82c3e36060c2c79156bc2018bfb16b56b","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"5d4f3d0f64f1016cb78b400a70b67df91fac99b5","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"c494a11da45ad7ec9b0ff216c3e3ace351193bb6","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"3afca89fae501dbd7421e1777b5b8f033b1d98d0","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"5c209299b0113e289e238fa5f2e8f00c59f76060","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"82f6dcea46cf5de65c4ba7283f7c7b34de4a324d","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"240c71a2aea36a1a4210f911a1c32ea88777e8e4","versionType":"git"},{"version":"8ea4484d0c2bb4e2152261943fa1a3522654b1c7","status":"affected","lessThan":"88ebadbf0deefdaccdab868b44ff70a0a257f473","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/mailbox-test.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.141","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.91","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.33","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.10","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mailbox/mailbox-test.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-26T19:40:52.927Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.6.141"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.12.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.18.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}