{"id":"CVE-2026-46309","aliases":[],"cve":{"records":[{"id":"CVE-2026-46309","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-05-13T15:03:33.111Z","published":"2026-06-08T15:50:39.689Z","modified":"2026-11-06T16:23:49.079Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-06-14T18:08:12.426Z"},{"name":"redhat-SADP","role":"ADP","organizationId":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c","modified":"2026-07-15T00:50:51.323Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-06T16:23:49.079Z"}],"references":[{"url":"https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39","tags":[],"source":"Linux"},{"url":"https://access.redhat.com/security/cve/CVE-2026-46309","tags":["vdb-entry","x_refsource_REDHAT"],"source":"redhat-SADP"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2486468","tags":["issue-tracking","x_refsource_REDHAT"],"source":"redhat-SADP"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46309.json","tags":["x_sadp-csaf-vex"],"source":"redhat-SADP"}],"weaknesses":[{"id":"CWE-524","description":"Use of Cache Containing Sensitive Information","source":"redhat-SADP"}],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.32"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.1"}]}]}]}],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-06T16:13:50.369836Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"partial"}]}]},"title":"drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise\n\nAdd validation in xe_vm_madvise_ioctl() to reject PAT indices with\nXE_COH_NONE coherency mode when applied to CPU cached memory.\n\nUsing coh_none with CPU cached buffers is a security issue. When the\nkernel clears pages before reallocation, the clear operation stays in\nCPU cache (dirty). GPU with coh_none can bypass CPU caches and read\nstale sensitive data directly from DRAM, potentially leaking data from\npreviously freed pages of other processes.\n\nThis aligns with the existing validation in vm_bind path\n(xe_vm_bind_ioctl_validate_bo).\n\nv2(Matthew brost)\n- Add fixes\n- Move one debug print to better place\n\nv3(Matthew Auld)\n- Should be drm/xe/uapi\n- More Cc\n\nv4(Shuicheng Lin)\n- Fix kmem leak issues by the way\n\nv5\n- Remove kmem leak because it has been merged by another patch\n\nv6\n- Remove the fix which is not related to current fix\n\nv7\n- No change\n\nv8\n- Rebase\n\nv9\n- Limit the restrictions to iGPU\n\nv10\n- No change\n\n(cherry picked from commit 016ccdb674b8c899940b3944952c96a6a490d10a)","score":7,"severity":"high","published":"2026-06-08T15:50:39.689Z","modified":"2026-11-06T16:23:49.079Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"ada7486c5668db542a7d361268df931aca5b726a","status":"affected","lessThan":"87f9b1528e1ffc1da3615d552c9a06aba5e20b00","versionType":"git"},{"version":"ada7486c5668db542a7d361268df931aca5b726a","status":"affected","lessThan":"fea04cf6f2345bc50f15b6638906c35962b89424","versionType":"git"},{"version":"ada7486c5668db542a7d361268df931aca5b726a","status":"affected","lessThan":"4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"6.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.18","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.9","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 10","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:10"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 6","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:6"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 7","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:7"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 7","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:7"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 8","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:8"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 8","platforms":[],"versions":[],"defaultStatus":"unaffected","cpes":["cpe:/o:redhat:enterprise_linux:8"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 9","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:9"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"},{"vendor":"Red Hat","name":"Red Hat Enterprise Linux 9","platforms":[],"versions":[],"defaultStatus":"affected","cpes":["cpe:/o:redhat:enterprise_linux:9"],"source":"redhat-SADP","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"}],"remediation":[],"references":["https://git.kernel.org/stable/c/87f9b1528e1ffc1da3615d552c9a06aba5e20b00","https://git.kernel.org/stable/c/fea04cf6f2345bc50f15b6638906c35962b89424","https://git.kernel.org/stable/c/4e5591c2fc1b30f4ea5e2eab4c3a695acc404e39","https://access.redhat.com/security/cve/CVE-2026-46309","https://bugzilla.redhat.com/show_bug.cgi?id=2486468","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46309.json"],"sources":[{"name":"CVE","id":"CVE-2026-46309","modified":"2026-11-06T16:23:49.079Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-46309"}],"assessments":[{"source":"redhat-SADP","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7}],"sourceAffected":[],"observedAt":"2026-11-06T16:53:18.680Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:45:32.518Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-08T05:40:33.383Z","attemptedAt":"2026-11-08T05:40:33.383Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-08T05:40:33.714Z","attemptedAt":"2026-11-08T05:40:33.714Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-08T05:40:34.399Z","attemptedAt":"2026-11-08T05:40:34.399Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-08T05:40:33.272Z","attemptedAt":"2026-11-08T05:40:33.272Z"}],"evidence":[{"source":"FIRST EPSS","id":"CVE-2026-46309","url":"https://www.first.org/epss/","probability":0.00125,"percentile":0.02213,"date":"2026-11-07","checkedAt":"2026-11-08T05:40:33.272Z"},{"source":"NVD","id":"CVE-2026-46309","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46309","modified":"2026-11-06T17:17:55.133","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-08T05:40:33.383Z"},{"source":"NVD","id":"CVE-2026-46309","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46309","modified":"2026-11-06T17:17:55.133","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-08T05:40:33.383Z"},{"source":"GitHub Advisory Database","id":"GHSA-vpjp-gfpq-57c9","url":"https://github.com/advisories/GHSA-vpjp-gfpq-57c9","modified":"2026-07-08T15:31:36Z","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-08T05:40:33.714Z"},{"source":"ENISA EUVD","id":"EUVD-2026-35119","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-35119","modified":"Nov 6, 2026, 4:23:49 PM","score":7,"vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","checkedAt":"2026-11-08T05:40:34.399Z"}],"aiSummary":null}