CVE-2026-31606

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That\nway, we can simply allocate a new one in hidg_bind."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/usb/gadget/function/f_hid.c"], "versions": [{"version": "cb382536052fcc7713988869b54a81137069e5a9", "lessThan": "92f23ab86d9524bc51dae25ed916d0e69dce5992", "status": "affected", "versionType": "git"}, {"version": "cb382536052fcc7713988869b54a81137069e5a9", "lessThan": "3aa77f5da0ecb00895411f4246d8a3e4db0343c2", "status": "affected", "versionType": "git"}, {"version": "cb382536052fcc7713988869b54a81137069e5a9", "lessThan": "c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43", "status": "affected", "versionType": "git"}, {"version": "cb382536052fcc7713988869b54a81137069e5a9", "lessThan": "eb6ef6185f2054a341ec70d7e2165f5381744215", "status": "affected", "versionType": "git"}, {"version": "cb382536052fcc7713988869b54a81137069e5a9", "lessThan": "5a229016ca3ac551294ec59770be9da94ec4bf63", "status": "affected", "versionType": "git"}, {"version": "cb382536052fcc7713988869b54a81137069e5a9", "lessThan": "75ecc46828ec377dd5692c677168ef6d64fd7123", "status": "affected", "versionType": "git"}, {"version": "cb382536052fcc7713988869b54a81137069e5a9", "lessThan": "81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d", "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/gadget/function/f_hid.c"], "versions": [{"version": "3.19", "status": "affected"}, {"version": "0", "lessThan": "3.19", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.83", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.24", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.14", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.1", "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": "3.19", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.0.1"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.19", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/92f23ab86d9524bc51dae25ed916d0e69dce5992"}, {"url": "https://git.kernel.org/stable/c/3aa77f5da0ecb00895411f4246d8a3e4db0343c2"}, {"url": "https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43"}, {"url": "https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215"}, {"url": "https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63"}, {"url": "https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123"}, {"url": "https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d"}], "title": "usb: gadget: f_hid: don't call cdev_init while cdev in use", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

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That's the case when\nthe /dev/hidg* device is still opened. This obviously unsafe behavior\nlike oopes.\n\nThis fixes this by using cdev_alloc to put the cdev on the heap. That\nway, we can simply allocate a new one in hidg_bind."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nusb: gadget: f_hid: no llamar a cdev_init mientras cdev est\u00e9 en uso\n\nAl llamar a unbind, luego a bind de nuevo, cdev_init reinicializaba el cdev, incluso si todav\u00eda puede haber referencias a \u00e9l. Ese es el caso cuando el dispositivo /dev/hidg todav\u00eda est\u00e1 abierto. Este comportamiento obviamente inseguro como oopes.\n\nEsto lo soluciona usando cdev_alloc para poner el cdev en el heap. De esa manera, podemos simplemente asignar uno nuevo en hidg_bind."}], "id": "CVE-2026-31606", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-04-24T15:16:39.830", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3aa77f5da0ecb00895411f4246d8a3e4db0343c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5a229016ca3ac551294ec59770be9da94ec4bf63"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/75ecc46828ec377dd5692c677168ef6d64fd7123"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/92f23ab86d9524bc51dae25ed916d0e69dce5992"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/eb6ef6185f2054a341ec70d7e2165f5381744215"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: usb: gadget: f_hid: don't call cdev_init while cdev in use", "id": "2461524", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461524"}, "csaw": false, "cwe": "CWE-413", "details": ["A flaw was found in the Linux kernel's USB Human Interface Device (HID) gadget driver. When the `/dev/hidg*` device is still open during unbind and bind operations, the character device (cdev) is reinitialized while still in use. This unsafe behavior can lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-31606", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31606\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31606\nhttps://lore.kernel.org/linux-cve-announce/2026042420-CVE-2026-31606-baa6@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cb382536052fcc7713988869b54a81137069e5a9,c6c0d13db5d0f8d465eabc14bd23d2b6a7247a43)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cb382536052fcc7713988869b54a81137069e5a9,eb6ef6185f2054a341ec70d7e2165f5381744215)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cb382536052fcc7713988869b54a81137069e5a9,5a229016ca3ac551294ec59770be9da94ec4bf63)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cb382536052fcc7713988869b54a81137069e5a9,75ecc46828ec377dd5692c677168ef6d64fd7123)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cb382536052fcc7713988869b54a81137069e5a9,81ebd43cc0d6d106ce7b6ccbf7b5e40ca7f5503d)"}}], "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": "3.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.83,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.24,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.14,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.1,7.1.0)"}}, {"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": "2026-04-27T19:00:15.622785+00:00", "updated": "2026-04-30T04:15:26.365332+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}