{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64331", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.781Z", "datePublished": "2026-07-25T08:49:58.370Z", "dateUpdated": "2026-07-25T08:49:58.370Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-25T08:49:58.370Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nusbip: vudc: fix NULL deref in vep_dequeue()\n\nvep_alloc_request() wasn't initializing vrequest->udc, so cancellations\non the FunctionFS AIO path were arriving in vep_dequeue without a valid\nUDC reference.\n\nSince vrequest->udc is never actually properly used anywhere, we opt to\nremove it, and update vep_dequeue to obtain a reference to the udc with\nep_to_vudc(), consistent with the other vep_ ops.\n\nAFAICT this bug has existed for ~10 years. Seems that nobody has really\nstressed the FunctionFS AIO path on usbip's vudc.\n\nI tested this fix in a QEMU aarch64 guest driving FunctionFS endpoints\nvia AIO. Before the fix, running `usbip attach` from the host would\ncause the guest to oops with the following backtrace:\n\nCall trace:\n vep_dequeue+0x1c/0xe4 (P)\n usb_ep_dequeue+0x14/0x20\n ffs_aio_cancel+0x24/0x34\n __arm64_sys_io_cancel+0xb0/0x124\n do_el0_svc+0x68/0x100\n el0_svc+0x18/0x5c\n el0t_64_sync_handler+0x98/0xdc\n el0t_64_sync+0x154/0x158"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/usbip/vudc.h", "drivers/usb/usbip/vudc_dev.c"], "versions": [{"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "9858c91d9ee6a13c45311569039413729fc9b757", "status": "affected", "versionType": "git"}, {"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "1226293ec9bed3d4cc5b05eeeb811d315ca51652", "status": "affected", "versionType": "git"}, {"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "3750f75f29f99c0223601e2ee73ad084adec47bd", "status": "affected", "versionType": "git"}, {"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "d0ebf9cc7c2ddf95a7cfc654b940bdacb7edde97", "status": "affected", "versionType": "git"}, {"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "0025276175fbbe0dcbf3f84d090b0adee769e9d9", "status": "affected", "versionType": "git"}, {"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "347b59e9f96719d89b6ef555d02a18ada1a5846f", "status": "affected", "versionType": "git"}, {"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "0443e4416aa1ee97748d1ed904eaf3352c60045e", "status": "affected", "versionType": "git"}, {"version": "b6a0ca11186759ad7045d68a5447b1e89f658384", "lessThan": "c5371e0b91b24159a3ebaa61e70b0980bcf03c0a", "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/usb/usbip/vudc.h", "drivers/usb/usbip/vudc_dev.c"], "versions": [{"version": "4.7", "status": "affected"}, {"version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "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": "6.12.96", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.39", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.4", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc3", "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": "4.7", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.12.96"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "6.18.39"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.1.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "7.2-rc3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/9858c91d9ee6a13c45311569039413729fc9b757"}, {"url": "https://git.kernel.org/stable/c/1226293ec9bed3d4cc5b05eeeb811d315ca51652"}, {"url": "https://git.kernel.org/stable/c/3750f75f29f99c0223601e2ee73ad084adec47bd"}, {"url": "https://git.kernel.org/stable/c/d0ebf9cc7c2ddf95a7cfc654b940bdacb7edde97"}, {"url": "https://git.kernel.org/stable/c/0025276175fbbe0dcbf3f84d090b0adee769e9d9"}, {"url": "https://git.kernel.org/stable/c/347b59e9f96719d89b6ef555d02a18ada1a5846f"}, {"url": "https://git.kernel.org/stable/c/0443e4416aa1ee97748d1ed904eaf3352c60045e"}, {"url": "https://git.kernel.org/stable/c/c5371e0b91b24159a3ebaa61e70b0980bcf03c0a"}], "title": "usbip: vudc: fix NULL deref in vep_dequeue()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,9858c91d9ee6a13c45311569039413729fc9b757)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,1226293ec9bed3d4cc5b05eeeb811d315ca51652)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,3750f75f29f99c0223601e2ee73ad084adec47bd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,d0ebf9cc7c2ddf95a7cfc654b940bdacb7edde97)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,0025276175fbbe0dcbf3f84d090b0adee769e9d9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,347b59e9f96719d89b6ef555d02a18ada1a5846f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,0443e4416aa1ee97748d1ed904eaf3352c60045e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b6a0ca11186759ad7045d68a5447b1e89f658384,c5371e0b91b24159a3ebaa61e70b0980bcf03c0a)"}}], "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": "generic", "value": "4.7"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.7)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.10.261,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[5.15.212,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.1.178,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.6.145,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.96,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.39,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.4,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc3,*]"}}], "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": "2026-07-25T13:45:03.873066+00:00", "updated": "2026-07-25T13:45:03.873100+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}