{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-99039", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.387Z", "datePublished": "2026-10-23T12:21:57.421Z", "dateUpdated": "2026-10-23T12:21:57.421Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-23T12:21:57.421Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmemstick: core: wait for request completion before freeing card\n\nIn memstick_alloc_card() and memstick_set_rw_addr(),\nwait_for_completion_timeout() is used to wait for device identification\nand address configuration requests to complete.\n\nThe memstick subsystem does not provide an abort or cancellation\ncallback in struct memstick_host for in-flight requests. If\nwait_for_completion_timeout() expires (for instance, when a USB transfer\nor command retry is delayed), memstick_alloc_card() returns an error and\nfrees the memstick_dev structure via kfree(card).\n\nHowever, the host controller driver (such as rtsx_usb_ms) is still\nrunning the request asynchronously in worker context. When the transfer\neventually finishes, the driver writes into host->req->data, which\npoints to memory inside the already freed card structure. This leads to\na KASAN slab-use-after-free write:\n\n BUG: KASAN: slab-use-after-free in ms_read_bytes+0x8fe/0x990\n Write of size 1 at addr ffff88813c188079 by task kworker/1:5/5239\n Workqueue: events rtsx_usb_ms_handle_req\n Call Trace:\n ms_read_bytes+0x8fe/0x990 drivers/memstick/host/rtsx_usb_ms.c:450\n rtsx_usb_ms_issue_cmd drivers/memstick/host/rtsx_usb_ms.c:477 [inline]\n rtsx_usb_ms_handle_req+0x557/0x1a00 drivers/memstick/host/rtsx_usb_ms.c:531\n process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396\n worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560\n kthread+0x373/0x450 kernel/kthread.c:436\n\n Allocated by task 1662:\n memstick_alloc_card drivers/memstick/core/memstick.c:383 [inline]\n memstick_check+0x2c1/0x10d0 drivers/memstick/core/memstick.c:452\n process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396\n\n Freed by task 1662:\n kfree+0x20c/0x650 mm/slub.c:6792\n memstick_alloc_card drivers/memstick/core/memstick.c:420 [inline]\n memstick_check+0x72b/0x10d0 drivers/memstick/core/memstick.c:452\n process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396\n\nHost controller drivers (rtsx_usb_ms, jmb38x_ms, tifm_ms, r592) already\nimplement their own hardware and bus timeouts, and callers in\nmspro_block and ms_block already rely on wait_for_completion()\nunconditionally.\n\nReplace wait_for_completion_timeout() with wait_for_completion() in\nmemstick_set_rw_addr() and memstick_alloc_card() so that the card\nstructure is never freed while an asynchronous request is in flight." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/memstick/core/memstick.c" ], "versions": [ { "version": "baf8532a147d5b76681ce040e2c8f25a3f0e718d", "lessThan": "c3ab92542475d59ae685cbb294e70ca4d0ba38e9", "status": "affected", "versionType": "git" }, { "version": "baf8532a147d5b76681ce040e2c8f25a3f0e718d", "lessThan": "810580cf60edc75c9891c2de3225e4cda78e4d9f", "status": "affected", "versionType": "git" }, { "version": "baf8532a147d5b76681ce040e2c8f25a3f0e718d", "lessThan": "f2795c50144d528dabc2cf2fd53c0f0c63a823a1", "status": "affected", "versionType": "git" }, { "version": "baf8532a147d5b76681ce040e2c8f25a3f0e718d", "lessThan": "3af81770e2011c6ac7bb597a4af2e4f3591f928c", "status": "affected", "versionType": "git" }, { "version": "baf8532a147d5b76681ce040e2c8f25a3f0e718d", "lessThan": "aa0a37b5024d921e96ac4f8f487c8bfbf1f1a582", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/memstick/core/memstick.c" ], "versions": [ { "version": "2.6.25", "status": "affected" }, { "version": "0", "lessThan": "2.6.25", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.11", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.6.160" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.12.113" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "6.18.57" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "7.2.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.25", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/c3ab92542475d59ae685cbb294e70ca4d0ba38e9" }, { "url": "https://git.kernel.org/stable/c/810580cf60edc75c9891c2de3225e4cda78e4d9f" }, { "url": "https://git.kernel.org/stable/c/f2795c50144d528dabc2cf2fd53c0f0c63a823a1" }, { "url": "https://git.kernel.org/stable/c/3af81770e2011c6ac7bb597a4af2e4f3591f928c" }, { "url": "https://git.kernel.org/stable/c/aa0a37b5024d921e96ac4f8f487c8bfbf1f1a582" } ], "title": "memstick: core: wait for request completion before freeing card", "x_generator": { "engine": "bippy-1.2.0" } } } }