206 lines
10 KiB
JSON
206 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-74472",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-15T05:44:03.902Z",
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"datePublished": "2026-08-15T12:27:08.759Z",
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"dateUpdated": "2026-08-19T16:37:23.182Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-19T16:37:23.182Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev()\n\nublk_ctrl_add_dev() memcpy()s the userspace ublksrv_ctrl_dev_info into\nub->dev_info and then fixes up the fields the driver owns, but misses\n->state and ->ublksrv_pid.\n\nA device added with ->state = UBLK_S_DEV_LIVE passes the\n\"->state != UBLK_S_DEV_DEAD\" test that ublk_stop_dev_unlocked() uses as its\nproxy for \"a disk is attached\", while ->ub_disk is still NULL, so DEL_DEV\nright after ADD_DEV oopses in del_gendisk(). UBLK_S_DEV_QUIESCED plus\nUBLK_F_USER_RECOVERY dies one step earlier, in ublk_force_abort_dev(). A\npoisoned ->state also gets START_USER_RECOVERY and the char device\nread/write path onto a device that was never started, and wedges START_DEV\nat -EEXIST. A poisoned ->ublksrv_pid just makes GET_DEV_INFO report an\nunrelated task as the ublk server.\n\nReset both after the memcpy(), as ublk_detach_disk() does. Userspace only\never reads these back, so correcting them silently breaks nothing.\n\nADD_DEV has copied ->state in unsanitized since ublk was merged, but back\nthen it was harmless: the gendisk was allocated during ADD_DEV, and both\nteardown and the START_DEV -EEXIST check keyed off disk_live() rather than\n->state. The oops became reachable once the disk allocation moved to\nSTART_DEV and those checks switched to ->state."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/block/ublk_drv.c"
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],
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"versions": [
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{
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"version": "6d9e6dfdf3b207701471f364121c67eefb000682",
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"lessThan": "787c944502e7e63d20a9201bada77e0dd924f458",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6d9e6dfdf3b207701471f364121c67eefb000682",
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"lessThan": "ee41b00858ca65b4428e99efe39a4277c1f043d2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6d9e6dfdf3b207701471f364121c67eefb000682",
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"lessThan": "b67ce16b26ad0f14cfd6071013840aa95f823bea",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6d9e6dfdf3b207701471f364121c67eefb000682",
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"lessThan": "205feb72e5beb3140e4e1403b6cff30cf739bab9",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6d9e6dfdf3b207701471f364121c67eefb000682",
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"lessThan": "127033b79383a3e78361d7e971588aa8849f5124",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "6d9e6dfdf3b207701471f364121c67eefb000682",
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"lessThan": "e65848e4ce352bac9e3465099354c8b8f845391f",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/block/ublk_drv.c"
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],
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"versions": [
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{
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"version": "6.0",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.183",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.151",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.103",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.44",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.8",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.1.183"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.6.151"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.12.103"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.18.44"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "7.1.8"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "7.2"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/787c944502e7e63d20a9201bada77e0dd924f458"
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},
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{
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"url": "https://git.kernel.org/stable/c/ee41b00858ca65b4428e99efe39a4277c1f043d2"
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},
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{
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"url": "https://git.kernel.org/stable/c/b67ce16b26ad0f14cfd6071013840aa95f823bea"
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},
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{
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"url": "https://git.kernel.org/stable/c/205feb72e5beb3140e4e1403b6cff30cf739bab9"
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},
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{
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"url": "https://git.kernel.org/stable/c/127033b79383a3e78361d7e971588aa8849f5124"
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},
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{
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"url": "https://git.kernel.org/stable/c/e65848e4ce352bac9e3465099354c8b8f845391f"
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}
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],
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"title": "ublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |