{"id":"CVE-2026-64021","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/oa: Fix exec_queue leak on width check in stream open\n\nIn xe_oa_stream_open_ioctl(), when param.exec_q->width > 1 the\nfunction returns -EOPNOTSUPP directly, skip…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/oa: Fix exec_queue leak on width check in stream open\n\nIn xe_oa_stream_open_ioctl(), when param.exec_q->width > 1 the\nfunction returns -EOPNOTSUPP directly, skip…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401","CWE-772"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 6.13.1, < 6.18.34","linux_kernel >= 6.19, < 7.0.11","linux_kernel = 6.13","linux_kernel = 7.1"],"patched":["linux_kernel 7.0.11"],"published":"2026-07-19","updated":"2026-10-13","sourceUpdated":"2026-10-13T14:55:44.783","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-64021","references":[{"url":"https://git.kernel.org/stable/c/04ef7592eaadd9ca8f8f66e76452f73525cff819","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4b0c4f0c1b133d4bfa31c167200bcda646873328","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/4d25342543c01310fc4e0cba7cb17c775e2421e2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64021.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-64021"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2502408"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64021"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64021"},{"url":"https://lore.kernel.org/linux-cve-announce/2026071901-CVE-2026-64021-d915@gregkh/T"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00121,"epssPercentile":0.01883,"ingestedAt":"2026-10-13T15:33:40.023Z","slug":"CVE-2026-64021","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/oa: Fix exec_queue leak on width check in stream open\n\nIn xe_oa_stream_open_ioctl(), when param.exec_q->width > 1 the\nfunction returns -EOPNOTSUPP directly, skipping the existing\nerr_exec_q cleanup path. The exec_queue reference obtained by\nxe_exec_queue_lookup() is leaked.\n\nThe exec queue holds a reference on the xe_file, which is only\ndropped during queue teardown. The leaked lookup ref is not on\nthe file's exec_queue xarray, so file close cannot release it.\nThis keeps both the exec queue and the file private state pinned\nindefinitely.\n\nJump to err_exec_q instead of returning directly so the reference\nis released.\n\n(cherry picked from commit 339fa0be9e4a5d69fa47e91f4a36574224fb478f)\n\n## Affected\n\n- `linux_kernel >= 6.13.1, < 6.18.34`\n- `linux_kernel >= 6.19, < 7.0.11`\n- `linux_kernel = 6.13`\n- `linux_kernel = 7.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 7.0.11`\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9 · updated 2026-10-13 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64021.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}