CVE-2026-74472

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74472", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.902Z", "datePublished": "2026-08-15T12:27:08.759Z", "dateUpdated": "2026-08-19T16:37:23.182Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:37:23.182Z"}, "descriptions": [{"lang": "en", "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/block/ublk_drv.c"], "versions": [{"version": "6d9e6dfdf3b207701471f364121c67eefb000682", "lessThan": "787c944502e7e63d20a9201bada77e0dd924f458", "status": "affected", "versionType": "git"}, {"version": "6d9e6dfdf3b207701471f364121c67eefb000682", "lessThan": "ee41b00858ca65b4428e99efe39a4277c1f043d2", "status": "affected", "versionType": "git"}, {"version": "6d9e6dfdf3b207701471f364121c67eefb000682", "lessThan": "b67ce16b26ad0f14cfd6071013840aa95f823bea", "status": "affected", "versionType": "git"}, {"version": "6d9e6dfdf3b207701471f364121c67eefb000682", "lessThan": "205feb72e5beb3140e4e1403b6cff30cf739bab9", "status": "affected", "versionType": "git"}, {"version": "6d9e6dfdf3b207701471f364121c67eefb000682", "lessThan": "127033b79383a3e78361d7e971588aa8849f5124", "status": "affected", "versionType": "git"}, {"version": "6d9e6dfdf3b207701471f364121c67eefb000682", "lessThan": "e65848e4ce352bac9e3465099354c8b8f845391f", "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/block/ublk_drv.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.0", "versionEndExcluding": "6.1.183"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.6.151"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/787c944502e7e63d20a9201bada77e0dd924f458"}, {"url": "https://git.kernel.org/stable/c/ee41b00858ca65b4428e99efe39a4277c1f043d2"}, {"url": "https://git.kernel.org/stable/c/b67ce16b26ad0f14cfd6071013840aa95f823bea"}, {"url": "https://git.kernel.org/stable/c/205feb72e5beb3140e4e1403b6cff30cf739bab9"}, {"url": "https://git.kernel.org/stable/c/127033b79383a3e78361d7e971588aa8849f5124"}, {"url": "https://git.kernel.org/stable/c/e65848e4ce352bac9e3465099354c8b8f845391f"}], "title": "ublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/block/ublk_drv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "787c944502e7e63d20a9201bada77e0dd924f458", "status": "affected", "version": "6d9e6dfdf3b207701471f364121c67eefb000682", "versionType": "git"}, {"lessThan": "ee41b00858ca65b4428e99efe39a4277c1f043d2", "status": "affected", "version": "6d9e6dfdf3b207701471f364121c67eefb000682", "versionType": "git"}, {"lessThan": "b67ce16b26ad0f14cfd6071013840aa95f823bea", "status": "affected", "version": "6d9e6dfdf3b207701471f364121c67eefb000682", "versionType": "git"}, {"lessThan": "205feb72e5beb3140e4e1403b6cff30cf739bab9", "status": "affected", "version": "6d9e6dfdf3b207701471f364121c67eefb000682", "versionType": "git"}, {"lessThan": "127033b79383a3e78361d7e971588aa8849f5124", "status": "affected", "version": "6d9e6dfdf3b207701471f364121c67eefb000682", "versionType": "git"}, {"lessThan": "e65848e4ce352bac9e3465099354c8b8f845391f", "status": "affected", "version": "6d9e6dfdf3b207701471f364121c67eefb000682", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/block/ublk_drv.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"lessThan": "6.0", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.151", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.103", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-74472", "lastModified": "2026-08-19T17:21:04.490", "metrics": {}, "published": "2026-08-15T13:17:51.953", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/127033b79383a3e78361d7e971588aa8849f5124"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/205feb72e5beb3140e4e1403b6cff30cf739bab9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/787c944502e7e63d20a9201bada77e0dd924f458"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b67ce16b26ad0f14cfd6071013840aa95f823bea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e65848e4ce352bac9e3465099354c8b8f845391f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ee41b00858ca65b4428e99efe39a4277c1f043d2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev()", "id": "2517061", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517061"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-824", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nublk: reset kernel-owned dev_info fields in ublk_ctrl_add_dev()\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.\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.\nReset both after the memcpy(), as ublk_detach_disk() does. Userspace only\never reads these back, so correcting them silently breaks nothing.\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.", "A flaw was found in the Linux kernel's `ublk` driver. This vulnerability arises from improper initialization of kernel-owned device information fields when a new `ublk` device is added. A local attacker could exploit this by providing malformed device information, which may lead to a kernel panic, resulting in a Denial of Service (DoS) for the system. This issue can also cause system instability or incorrect reporting of the `ublk` server process."], "name": "CVE-2026-74472", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74472\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74472\nhttps://lore.kernel.org/linux-cve-announce/2026081535-CVE-2026-74472-fcab@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6d9e6dfdf3b207701471f364121c67eefb000682,ee41b00858ca65b4428e99efe39a4277c1f043d2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6d9e6dfdf3b207701471f364121c67eefb000682,b67ce16b26ad0f14cfd6071013840aa95f823bea)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6d9e6dfdf3b207701471f364121c67eefb000682,205feb72e5beb3140e4e1403b6cff30cf739bab9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6d9e6dfdf3b207701471f364121c67eefb000682,127033b79383a3e78361d7e971588aa8849f5124)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6d9e6dfdf3b207701471f364121c67eefb000682,e65848e4ce352bac9e3465099354c8b8f845391f)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.151,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.103,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T14:15:03.646555+00:00", "updated": "2026-08-21T21:30:17.766015+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-125", "CWE-416", "CWE-824"]}