CVE-2026-46065

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-46065", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-13T15:03:33.095Z", "datePublished": "2026-05-27T12:57:32.968Z", "dateUpdated": "2026-10-19T19:26:42.635Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:27.785Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info\n\nHold state of deferred I/O in struct fb_deferred_io_state. Allocate an\ninstance as part of initializing deferred I/O and remove it only after\nthe final mapping has been closed. If the fb_info and the contained\ndeferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info\nto invalidate the mapping. Any access will then result in a SIGBUS\nsignal.\n\nFixes a long-standing problem, where a device hot-unplug happens while\nuser space still has an active mapping of the graphics memory. The hot-\nunplug frees the instance of struct fb_info. Accessing the memory will\noperate on undefined state."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable fault handlers are reached by mmap'ing /dev/fbN and accessing the mapping \u2014 a local operation requiring no network. Device removal (the precondition) can be non-physical (VM host-driven removal, sysfs unbind, module unload), so Local is the most severe defensible vector over Physical.\nAC:L - Once the device is removed while a mapping is active, any access deterministically hits the freed defio state/video pages \u2014 no race must be won to trigger it. In a kiosk/embedded scenario with a removable display the attacker controls both the mapping and the removal, and heap reclaim is attacker-influenced.\nPR:L - Exploitation requires only a local user with access to the framebuffer device, which is granted to the logged-in/console user, video-group members, Android apps, and is often world-accessible on embedded/kiosk systems. No root or init-namespace privilege is needed.\nUI:N - The attacker performs all steps themselves \u2014 map the framebuffer, cause/await removal, then access the mapping \u2014 with no separate victim action required.\nS:U - The use-after-free corrupts kernel memory within the same security authority; even in the VM-framebuffer case the impact stays inside the guest kernel and does not cross into the hypervisor.\nC:H - The fault handler returns freed-and-reclaimed video pages and the freed pagerefs array to userspace, allowing disclosure of arbitrary reallocated kernel/user memory \u2014 a use-after-free read primitive.\nI:H - The write-fault path writes a page pointer and offset into the kvfree'd pagerefs array and exposes freed/reallocated pages for writing, giving a use-after-free write primitive usable for control-flow hijacking via heap spraying.\nA:H - Accessing the mapping after teardown uses a destroyed mutex, freed pagerefs, and hits BUG_ON(!info->fbdefio->mapping), reliably causing an oops/panic; any use-after-free crashes the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/video/fbdev/core/fb_defio.c", "include/linux/fb.h"], "versions": [{"version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "4aab89603b637a2e441b38808c4f6fe7d1184df6", "status": "affected", "versionType": "git"}, {"version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "4fda0d6b45faad44926dd3e4f55f118d899b2e27", "status": "affected", "versionType": "git"}, {"version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "2a40f8bc9bb713329f1c35ffc199ee961a7135b0", "status": "affected", "versionType": "git"}, {"version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066", "status": "affected", "versionType": "git"}, {"version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "25c2b77bc463f29ee71a54b883548baf9386a0db", "status": "affected", "versionType": "git"}, {"version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "a0aafb421dd15e935d81543152617f2742cefa70", "status": "affected", "versionType": "git"}, {"version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "9ded47ad003f09a94b6a710b5c47f4aa5ceb7429", "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/video/fbdev/core/fb_defio.c", "include/linux/fb.h"], "versions": [{"version": "2.6.22", "status": "affected"}, {"version": "0", "lessThan": "2.6.22", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.140", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.88", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.30", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.4", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "2.6.22", "versionEndExcluding": "5.15.210"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.1.176"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.12.88"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "6.18.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.0.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.22", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4aab89603b637a2e441b38808c4f6fe7d1184df6"}, {"url": "https://git.kernel.org/stable/c/4fda0d6b45faad44926dd3e4f55f118d899b2e27"}, {"url": "https://git.kernel.org/stable/c/2a40f8bc9bb713329f1c35ffc199ee961a7135b0"}, {"url": "https://git.kernel.org/stable/c/2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066"}, {"url": "https://git.kernel.org/stable/c/25c2b77bc463f29ee71a54b883548baf9386a0db"}, {"url": "https://git.kernel.org/stable/c/a0aafb421dd15e935d81543152617f2742cefa70"}, {"url": "https://git.kernel.org/stable/c/9ded47ad003f09a94b6a710b5c47f4aa5ceb7429"}], "title": "fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-15T01:20:19.593Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}]}, {"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46065", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:19:22.528676Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T19:26:42.635Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "x_adpType": "supplier", "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-15T01:20:19.593Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46065", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:19:22.528676Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:19:23.113Z"}}], "cna": {"title": "fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 7.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerable fault handlers are reached by mmap'ing /dev/fbN and accessing the mapping \u2014 a local operation requiring no network. Device removal (the precondition) can be non-physical (VM host-driven removal, sysfs unbind, module unload), so Local is the most severe defensible vector over Physical.\nAC:L - Once the device is removed while a mapping is active, any access deterministically hits the freed defio state/video pages \u2014 no race must be won to trigger it. In a kiosk/embedded scenario with a removable display the attacker controls both the mapping and the removal, and heap reclaim is attacker-influenced.\nPR:L - Exploitation requires only a local user with access to the framebuffer device, which is granted to the logged-in/console user, video-group members, Android apps, and is often world-accessible on embedded/kiosk systems. No root or init-namespace privilege is needed.\nUI:N - The attacker performs all steps themselves \u2014 map the framebuffer, cause/await removal, then access the mapping \u2014 with no separate victim action required.\nS:U - The use-after-free corrupts kernel memory within the same security authority; even in the VM-framebuffer case the impact stays inside the guest kernel and does not cross into the hypervisor.\nC:H - The fault handler returns freed-and-reclaimed video pages and the freed pagerefs array to userspace, allowing disclosure of arbitrary reallocated kernel/user memory \u2014 a use-after-free read primitive.\nI:H - The write-fault path writes a page pointer and offset into the kvfree'd pagerefs array and exposes freed/reallocated pages for writing, giving a use-after-free write primitive usable for control-flow hijacking via heap spraying.\nA:H - Accessing the mapping after teardown uses a destroyed mutex, freed pagerefs, and hits BUG_ON(!info->fbdefio->mapping), reliably causing an oops/panic; any use-after-free crashes the kernel."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "4aab89603b637a2e441b38808c4f6fe7d1184df6", "versionType": "git"}, {"status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "4fda0d6b45faad44926dd3e4f55f118d899b2e27", "versionType": "git"}, {"status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "2a40f8bc9bb713329f1c35ffc199ee961a7135b0", "versionType": "git"}, {"status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066", "versionType": "git"}, {"status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "25c2b77bc463f29ee71a54b883548baf9386a0db", "versionType": "git"}, {"status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "a0aafb421dd15e935d81543152617f2742cefa70", "versionType": "git"}, {"status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "lessThan": "9ded47ad003f09a94b6a710b5c47f4aa5ceb7429", "versionType": "git"}], "programFiles": ["drivers/video/fbdev/core/fb_defio.c", "include/linux/fb.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.22"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.22", "versionType": "semver"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.88", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.30", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.4", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/video/fbdev/core/fb_defio.c", "include/linux/fb.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/4aab89603b637a2e441b38808c4f6fe7d1184df6"}, {"url": "https://git.kernel.org/stable/c/4fda0d6b45faad44926dd3e4f55f118d899b2e27"}, {"url": "https://git.kernel.org/stable/c/2a40f8bc9bb713329f1c35ffc199ee961a7135b0"}, {"url": "https://git.kernel.org/stable/c/2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066"}, {"url": "https://git.kernel.org/stable/c/25c2b77bc463f29ee71a54b883548baf9386a0db"}, {"url": "https://git.kernel.org/stable/c/a0aafb421dd15e935d81543152617f2742cefa70"}, {"url": "https://git.kernel.org/stable/c/9ded47ad003f09a94b6a710b5c47f4aa5ceb7429"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info\n\nHold state of deferred I/O in struct fb_deferred_io_state. Allocate an\ninstance as part of initializing deferred I/O and remove it only after\nthe final mapping has been closed. If the fb_info and the contained\ndeferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info\nto invalidate the mapping. Any access will then result in a SIGBUS\nsignal.\n\nFixes a long-standing problem, where a device hot-unplug happens while\nuser space still has an active mapping of the graphics memory. The hot-\nunplug frees the instance of struct fb_info. Accessing the memory will\noperate on undefined state."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.210", "versionStartIncluding": "2.6.22"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.176", "versionStartIncluding": "2.6.22"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.140", "versionStartIncluding": "2.6.22"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.88", "versionStartIncluding": "2.6.22"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.30", "versionStartIncluding": "2.6.22"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.4", "versionStartIncluding": "2.6.22"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "2.6.22"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:29:27.785Z"}}}, "cveMetadata": {"cveId": "CVE-2026-46065", "state": "PUBLISHED", "dateUpdated": "2026-10-19T19:26:42.635Z", "dateReserved": "2026-05-13T15:03:33.095Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-05-27T12:57:32.968Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/video/fbdev/core/fb_defio.c", "include/linux/fb.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4aab89603b637a2e441b38808c4f6fe7d1184df6", "status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "versionType": "git"}, {"lessThan": "4fda0d6b45faad44926dd3e4f55f118d899b2e27", "status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "versionType": "git"}, {"lessThan": "2a40f8bc9bb713329f1c35ffc199ee961a7135b0", "status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "versionType": "git"}, {"lessThan": "2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066", "status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "versionType": "git"}, {"lessThan": "25c2b77bc463f29ee71a54b883548baf9386a0db", "status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "versionType": "git"}, {"lessThan": "a0aafb421dd15e935d81543152617f2742cefa70", "status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "versionType": "git"}, {"lessThan": "9ded47ad003f09a94b6a710b5c47f4aa5ceb7429", "status": "affected", "version": "60b59beafba875aef6d378078bce0baf2287ae14", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/video/fbdev/core/fb_defio.c", "include/linux/fb.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.22"}, {"lessThan": "2.6.22", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.210", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.176", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.140", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.88", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.30", "versionType": "semver"}, {"lessThanOrEqual": "7.0.*", "status": "unaffected", "version": "7.0.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"affectedData": [{"defaultStatus": "unknown", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D0822DE2-87B7-4AAA-8C9C-619AB726A035", "versionEndExcluding": "5.15.210", "versionStartIncluding": "2.6.22", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C4446623-5F2B-4DD8-8666-9FAAC285A757", "versionEndExcluding": "6.1.176", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D", "versionEndExcluding": "6.6.140", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "5AFBE0EC-CCDF-4207-AE92-ABF958125CA4", "versionEndExcluding": "6.12.88", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "BF39AE08-AE6D-4410-8FBE-76F6BF5BF55B", "versionEndExcluding": "6.18.30", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3", "versionEndExcluding": "7.0.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info\n\nHold state of deferred I/O in struct fb_deferred_io_state. Allocate an\ninstance as part of initializing deferred I/O and remove it only after\nthe final mapping has been closed. If the fb_info and the contained\ndeferred I/O meanwhile goes away, clear struct fb_deferred_io_state.info\nto invalidate the mapping. Any access will then result in a SIGBUS\nsignal.\n\nFixes a long-standing problem, where a device hot-unplug happens while\nuser space still has an active mapping of the graphics memory. The hot-\nunplug frees the instance of struct fb_info. Accessing the memory will\noperate on undefined state."}], "id": "CVE-2026-46065", "lastModified": "2026-10-19T20:18:25.487", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46065", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:19:22.528676Z", "version": "2.0.3"}}]}, "published": "2026-05-27T14:17:27.050", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25c2b77bc463f29ee71a54b883548baf9386a0db"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2a40f8bc9bb713329f1c35ffc199ee961a7135b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4aab89603b637a2e441b38808c4f6fe7d1184df6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4fda0d6b45faad44926dd3e4f55f118d899b2e27"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ded47ad003f09a94b6a710b5c47f4aa5ceb7429"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a0aafb421dd15e935d81543152617f2742cefa70"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info", "id": "2482139", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482139"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's framebuffer device (fbdev) deferred I/O (defio) mechanism. A local user with an active mapping of graphics memory could trigger a device hot-unplug, leading to the system accessing undefined memory. This can result in system instability or a crash, causing a Denial of Service (DoS)."], "name": "CVE-2026-46065", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46065\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46065\nhttps://lore.kernel.org/linux-cve-announce/2026052757-CVE-2026-46065-9fb8@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[60b59beafba875aef6d378078bce0baf2287ae14,2a40f8bc9bb713329f1c35ffc199ee961a7135b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[60b59beafba875aef6d378078bce0baf2287ae14,2b53d3a52e8e5403a4f4fb57ac6cad3fd2cb1066)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[60b59beafba875aef6d378078bce0baf2287ae14,25c2b77bc463f29ee71a54b883548baf9386a0db)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[60b59beafba875aef6d378078bce0baf2287ae14,a0aafb421dd15e935d81543152617f2742cefa70)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[60b59beafba875aef6d378078bce0baf2287ae14,9ded47ad003f09a94b6a710b5c47f4aa5ceb7429)"}}], "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": "semver", "value": "2.6.22"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.22)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.140,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.88,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.30,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0.4,7.0.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1-rc1,*]"}}], "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": "2026-05-27T20:15:16.212243+00:00", "updated": "2026-10-23T01:15:14.057135+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}