{"id":"CVE-2025-38074","summary":"vhost-scsi: protect vq-\u003elog_used with vq-\u003emutex","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvhost-scsi: protect vq-\u003elog_used with vq-\u003emutex\n\nThe vhost-scsi completion path may access vq-\u003elog_base when vq-\u003elog_used is\nalready set to false.\n\n    vhost-thread                       QEMU-thread\n\nvhost_scsi_complete_cmd_work()\n-\u003e vhost_add_used()\n   -\u003e vhost_add_used_n()\n      if (unlikely(vq-\u003elog_used))\n                                      QEMU disables vq-\u003elog_used\n                                      via VHOST_SET_VRING_ADDR.\n                                      mutex_lock(&vq-\u003emutex);\n                                      vq-\u003elog_used = false now!\n                                      mutex_unlock(&vq-\u003emutex);\n\n\t\t\t\t      QEMU gfree(vq-\u003elog_base)\n        log_used()\n        -\u003e log_write(vq-\u003elog_base)\n\nAssuming the VMM is QEMU. The vq-\u003elog_base is from QEMU userpace and can be\nreclaimed via gfree(). As a result, this causes invalid memory writes to\nQEMU userspace.\n\nThe control queue path has the same issue.","modified":"2026-05-18T05:59:29.663675278Z","published":"2025-06-18T09:33:50.006Z","related":["SUSE-SU-2025:02846-1","SUSE-SU-2025:02853-1","SUSE-SU-2025:02923-1","SUSE-SU-2025:02969-1","SUSE-SU-2025:02996-1","SUSE-SU-2025:02997-1","SUSE-SU-2025:03011-1","SUSE-SU-2025:03023-1","SUSE-SU-2025:20577-1","SUSE-SU-2025:20586-1","SUSE-SU-2025:20601-1","SUSE-SU-2025:20602-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38074.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/59614c5acf6688f7af3c245d359082c0e9e53117"},{"type":"WEB","url":"https://git.kernel.org/stable/c/80cf68489681c165ded460930e391b1eb37b5f6f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8312a1ccff1566f375191a89b9ba71b6eb48a8cd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd8c9404e44adb9f6219c09b3409a61ab7ce3427"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c0039e3afda29be469d29b3013d7f9bdee136834"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ca85c2d0db5f8309832be45858b960d933c2131c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f591cf9fce724e5075cc67488c43c6e39e8cbe27"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38074.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38074"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"057cbf49a1f08297877e46c82f707b1bfea806a8"},{"fixed":"80cf68489681c165ded460930e391b1eb37b5f6f"},{"fixed":"8312a1ccff1566f375191a89b9ba71b6eb48a8cd"},{"fixed":"59614c5acf6688f7af3c245d359082c0e9e53117"},{"fixed":"ca85c2d0db5f8309832be45858b960d933c2131c"},{"fixed":"bd8c9404e44adb9f6219c09b3409a61ab7ce3427"},{"fixed":"c0039e3afda29be469d29b3013d7f9bdee136834"},{"fixed":"f591cf9fce724e5075cc67488c43c6e39e8cbe27"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38074.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.6.0"},{"fixed":"5.10.240"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.189"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.146"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.93"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.31"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.14.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38074.json"}}],"schema_version":"1.7.5"}