{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64585", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.798Z", "datePublished": "2026-08-06T07:06:26.556Z", "dateUpdated": "2026-08-08T15:13:22.712Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-08T15:13:22.712Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: esd_usb: kill anchored URBs before freeing netdevs\n\nesd_usb_disconnect() frees each CAN netdev with free_candev() inside\nits per-netdev loop and only calls unlink_all_urbs(dev) afterwards.\nThe per-netdev private data (struct esd_usb_net_priv) is embedded in\nthe net_device allocation returned by alloc_candev(), so once\nfree_candev() has run, dev->nets[i] points to freed memory.\nunlink_all_urbs() then dereferences the freed dev->nets[i] to kill the\nper-netdev TX anchor (usb_kill_anchored_urbs(&priv->tx_submitted)),\nclear active_tx_jobs, and reset priv->tx_contexts[].\n\nReorder the teardown so the anchored URBs are killed before the netdevs\nare freed, matching other CAN/USB drivers in the same directory such as\nems_usb, usb_8dev and mcba_usb, which unregister, then unlink, then\nfree: unregister the netdevs first (which stops their TX queues), call\nunlink_all_urbs(dev) once, then free the netdevs.\n\nThis issue was found by an in-house static analysis tool."}], "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 UAF is reached by forcing esd_usb_disconnect() via local usbfs USBDEVFS_DISCONNECT, sysfs unbind, or USB emulation, not by network/CAN traffic; this matches AV:L scoring of analogous USB disconnect UAFs (e.g. CVE-2025-40283).\nAC:L - Once disconnect runs, free_candev() then unlink_all_urbs() deterministically uses freed esd_usb_net_priv in the same teardown path; the attacker fully controls when unbind occurs, with no attacker-uncontrollable race required.\nPR:L - A basic local account with write access to the USB device node (plugdev/uaccess or USB passthrough) can issue USBDEVFS_DISCONNECT; that path has no CAP_SYS_ADMIN check, so init-namespace root is not required.\nUI:N - The attacker issues disconnect/unbind against an already-bound esd CAN-USB interface (or their own matching VID/PID device) without any separate victim action.\nS:U - The freed netdev-private object and subsequent URB teardown run entirely within the host kernel security authority; this is not a VM, IOMMU, or sandbox boundary escape.\nC:H - Use-after-free of struct esd_usb_net_priv (embedded in the freed candev) lets a reclaimed object supply attacker-controlled pointer-rich state read through usb_kill_anchored_urbs() and related teardown, enabling kernel disclosure.\nI:H - unlink_all_urbs() writes through the freed priv (usb_kill_anchored_urbs on tx_submitted, atomic_set of active_tx_jobs, and tx_contexts[] resets), giving a heap UAF write primitive suitable for control-flow hijack.\nA:H - Dereferencing the freed per-netdev private data during disconnect reliably causes kernel oops/panic, and the attacker can repeat unbind/rebind to re-trigger the crash."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/can/usb/esd_usb.c"], "versions": [{"version": "96d8e90382dc336b5de401164597edfdc2e8d9f1", "lessThan": "aa1d005927db38af783c1a4a8a00a39e0229ab2d", "status": "affected", "versionType": "git"}, {"version": "96d8e90382dc336b5de401164597edfdc2e8d9f1", "lessThan": "a02e1d8f191324583599544d54e59e6a2b74bb0e", "status": "affected", "versionType": "git"}, {"version": "96d8e90382dc336b5de401164597edfdc2e8d9f1", "lessThan": "a3314f10369df70925140f59bbe069718f65a0b9", "status": "affected", "versionType": "git"}, {"version": "96d8e90382dc336b5de401164597edfdc2e8d9f1", "lessThan": "765ba1c91823a296447528791b89a6504947fd5c", "status": "affected", "versionType": "git"}, {"version": "96d8e90382dc336b5de401164597edfdc2e8d9f1", "lessThan": "5832c55b3c824ba2fe9c36ac3c411baddcce053e", "status": "affected", "versionType": "git"}, {"version": "96d8e90382dc336b5de401164597edfdc2e8d9f1", "lessThan": "c43122fef328a70045fe7621c06de6b2b8e19264", "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/net/can/usb/esd_usb.c"], "versions": [{"version": "2.6.36", "status": "affected"}, {"version": "0", "lessThan": "2.6.36", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc4", "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": "2.6.36", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.36", "versionEndExcluding": "7.2-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/aa1d005927db38af783c1a4a8a00a39e0229ab2d"}, {"url": "https://git.kernel.org/stable/c/a02e1d8f191324583599544d54e59e6a2b74bb0e"}, {"url": "https://git.kernel.org/stable/c/a3314f10369df70925140f59bbe069718f65a0b9"}, {"url": "https://git.kernel.org/stable/c/765ba1c91823a296447528791b89a6504947fd5c"}, {"url": "https://git.kernel.org/stable/c/5832c55b3c824ba2fe9c36ac3c411baddcce053e"}, {"url": "https://git.kernel.org/stable/c/c43122fef328a70045fe7621c06de6b2b8e19264"}], "title": "can: esd_usb: kill anchored URBs before freeing netdevs", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[96d8e90382dc336b5de401164597edfdc2e8d9f1,aa1d005927db38af783c1a4a8a00a39e0229ab2d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[96d8e90382dc336b5de401164597edfdc2e8d9f1,a02e1d8f191324583599544d54e59e6a2b74bb0e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[96d8e90382dc336b5de401164597edfdc2e8d9f1,a3314f10369df70925140f59bbe069718f65a0b9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[96d8e90382dc336b5de401164597edfdc2e8d9f1,765ba1c91823a296447528791b89a6504947fd5c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[96d8e90382dc336b5de401164597edfdc2e8d9f1,5832c55b3c824ba2fe9c36ac3c411baddcce053e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[96d8e90382dc336b5de401164597edfdc2e8d9f1,c43122fef328a70045fe7621c06de6b2b8e19264)"}}], "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": "2.6.36"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.36)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "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": "2026-08-06T08:30:17.167326+00:00", "updated": "2026-08-08T18:30:03.342200+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-416"]}