{"id":"CVE-2026-74313","title":"vduse: hold vduse_lock across IDR lookup in open path","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nvduse: hold vduse_lock across IDR lookup in open path\n\nvduse_dev_open() looks up struct vduse_dev through the IDR and then\nacquires dev->lock only after vduse_lock has …","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 35483c5306e09b3190ff937089d404a78012695c","Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 5c1560be8aa6849356455af67518d35c551cbd95","Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 93ed4692f2299a40346025979f40e4a9b7b33af7","Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < d94e2947203aead590fd63f667d316d4475d65af","Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2","Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 79e12c891940b0c4c75881b7fd82a8cbb8ac97be","Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < e440e077748939839d9f76e24383b76b785f80ce","Linux 5.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:53:05.168424Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:55:32.347Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74313","references":[{"url":"https://git.kernel.org/stable/c/35483c5306e09b3190ff937089d404a78012695c"},{"url":"https://git.kernel.org/stable/c/5c1560be8aa6849356455af67518d35c551cbd95"},{"url":"https://git.kernel.org/stable/c/93ed4692f2299a40346025979f40e4a9b7b33af7"},{"url":"https://git.kernel.org/stable/c/d94e2947203aead590fd63f667d316d4475d65af"},{"url":"https://git.kernel.org/stable/c/a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2"},{"url":"https://git.kernel.org/stable/c/79e12c891940b0c4c75881b7fd82a8cbb8ac97be"},{"url":"https://git.kernel.org/stable/c/e440e077748939839d9f76e24383b76b785f80ce"}],"tags":["cve.org"],"epss":0.00171,"epssPercentile":0.06039,"ingestedAt":"2026-10-16T19:46:24.380Z","slug":"CVE-2026-74313","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nvduse: hold vduse_lock across IDR lookup in open path\n\nvduse_dev_open() looks up struct vduse_dev through the IDR and then\nacquires dev->lock only after vduse_lock has been dropped.\n\nThis leaves a window where a concurrent VDUSE_DESTROY_DEV can remove the\nsame object from the IDR and free it before the open path locks the\ndevice, leading to a use-after-free.\n\nClose this race by keeping vduse_lock held until dev->lock has been\nacquired in the open path, matching the lock ordering already used by\nthe destroy path.\n\n## Affected\n\n- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 35483c5306e09b3190ff937089d404a78012695c`\n- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 5c1560be8aa6849356455af67518d35c551cbd95`\n- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 93ed4692f2299a40346025979f40e4a9b7b33af7`\n- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < d94e2947203aead590fd63f667d316d4475d65af`\n- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < a2d0a57538fd0b3b3ab75d64bb64f4cd2fab13a2`\n- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < 79e12c891940b0c4c75881b7fd82a8cbb8ac97be`\n- `Linux >= c8a6153b6c59d95c0e091f053f6f180952ade91e < e440e077748939839d9f76e24383b76b785f80ce`\n- `Linux 5.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}