{"id":"CVE-2026-99035","state":"PUBLISHED","title":"mmc: mtk-sd: Cancel request timeout work on remove","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: mtk-sd: Cancel request timeout work on remove\n\nThe driver queues req_timeout while a request is active.\nmsdc_request_done() uses cancel_delayed_work(), which does not wait for\na timeout callback that has already started.\n\nThe timeout callback calls mmc_request_done(), which wakes the request\nwaiter, and then continues to use host->dev_comp and check the SDIO IRQ.\nDuring unbind, msdc_drv_remove() can return and the managed mmc_host can\nbe freed before the callback finishes.\n\nKASAN reported use-after-free accesses in msdc_request_done() and\nmsdc_recheck_sdio_irq() in each of three unbind tests.  The same tests\ncompleted without a kernel diagnostic after this change.\n\nCall cancel_delayed_work_sync() after mmc_remove_host() has stopped new\nrequests and before the driver releases the host resources.","publishedAt":"2026-10-23T12:21:44.522Z","updatedAt":"2026-10-30T12:41:08.346Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"d8ce81006ee4e42ce2d0bd3a2ab87adc1e24ef11","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"2cff6a2a912a3464ae1fefb7e0a82393682ccea6","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"e5d82695f2cabca3222b8f6a89ea0e18bafc4c0a","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"9e799f25c420e759641eb25102967ea091fc758f","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"f37e0367ad6f2147a0b37564b442b7a25bec0d23","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"46e75703ca3f00fb8c935b3ce35b90836e34e8af","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"edef1355224c0799a502a46b71d3649fa0dd218e","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"b38af5386a74416e898955443f2e26547b358cb2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/host/mtk-sd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/host/mtk-sd.c"]}],"references":["https://git.kernel.org/stable/c/d8ce81006ee4e42ce2d0bd3a2ab87adc1e24ef11","https://git.kernel.org/stable/c/2cff6a2a912a3464ae1fefb7e0a82393682ccea6","https://git.kernel.org/stable/c/e5d82695f2cabca3222b8f6a89ea0e18bafc4c0a","https://git.kernel.org/stable/c/9e799f25c420e759641eb25102967ea091fc758f","https://git.kernel.org/stable/c/f37e0367ad6f2147a0b37564b442b7a25bec0d23","https://git.kernel.org/stable/c/46e75703ca3f00fb8c935b3ce35b90836e34e8af","https://git.kernel.org/stable/c/edef1355224c0799a502a46b71d3649fa0dd218e","https://git.kernel.org/stable/c/b38af5386a74416e898955443f2e26547b358cb2"],"weaknesses":[],"ingestedAt":"2026-10-30T13:00:06.648Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/99xxx/CVE-2026-99035.json","commit":"cb14bf1b43b0c9f05f7f40eae2246263fd430780","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-99035","state":"PUBLISHED","datePublished":"2026-10-23T12:21:44.522Z","dateUpdated":"2026-10-30T12:41:08.346Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.387Z"},"containers":{"cna":{"title":"mmc: mtk-sd: Cancel request timeout work on remove","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmmc: mtk-sd: Cancel request timeout work on remove\n\nThe driver queues req_timeout while a request is active.\nmsdc_request_done() uses cancel_delayed_work(), which does not wait for\na timeout callback that has already started.\n\nThe timeout callback calls mmc_request_done(), which wakes the request\nwaiter, and then continues to use host->dev_comp and check the SDIO IRQ.\nDuring unbind, msdc_drv_remove() can return and the managed mmc_host can\nbe freed before the callback finishes.\n\nKASAN reported use-after-free accesses in msdc_request_done() and\nmsdc_recheck_sdio_irq() in each of three unbind tests.  The same tests\ncompleted without a kernel diagnostic after this change.\n\nCall cancel_delayed_work_sync() after mmc_remove_host() has stopped new\nrequests and before the driver releases the host resources."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"d8ce81006ee4e42ce2d0bd3a2ab87adc1e24ef11","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"2cff6a2a912a3464ae1fefb7e0a82393682ccea6","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"e5d82695f2cabca3222b8f6a89ea0e18bafc4c0a","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"9e799f25c420e759641eb25102967ea091fc758f","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"f37e0367ad6f2147a0b37564b442b7a25bec0d23","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"46e75703ca3f00fb8c935b3ce35b90836e34e8af","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"edef1355224c0799a502a46b71d3649fa0dd218e","versionType":"git"},{"version":"208489032bdd8d4a7de50f3057c175058f271956","status":"affected","lessThan":"b38af5386a74416e898955443f2e26547b358cb2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/host/mtk-sd.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.2","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.224","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.113","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.11","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/mmc/host/mtk-sd.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/d8ce81006ee4e42ce2d0bd3a2ab87adc1e24ef11"},{"url":"https://git.kernel.org/stable/c/2cff6a2a912a3464ae1fefb7e0a82393682ccea6"},{"url":"https://git.kernel.org/stable/c/e5d82695f2cabca3222b8f6a89ea0e18bafc4c0a"},{"url":"https://git.kernel.org/stable/c/9e799f25c420e759641eb25102967ea091fc758f"},{"url":"https://git.kernel.org/stable/c/f37e0367ad6f2147a0b37564b442b7a25bec0d23"},{"url":"https://git.kernel.org/stable/c/46e75703ca3f00fb8c935b3ce35b90836e34e8af"},{"url":"https://git.kernel.org/stable/c/edef1355224c0799a502a46b71d3649fa0dd218e"},{"url":"https://git.kernel.org/stable/c/b38af5386a74416e898955443f2e26547b358cb2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:41:08.346Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"5.15.224"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.2.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.2","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}