CVE-2026-31582

{"id": "CVE-2026-31582", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "4381a36abdf1c5c0323c1c51f869dc000115eb20", "lessThan": "c78e1d4e48f23792adaa7c94251e22b0d9700a39", "versionType": "git"}, {"status": "affected", "version": "4381a36abdf1c5c0323c1c51f869dc000115eb20", "lessThan": "9e1b798257f96d2e2a2639830eb71add545ce749", "versionType": "git"}, {"status": "affected", "version": "4381a36abdf1c5c0323c1c51f869dc000115eb20", "lessThan": "7003ae4810ca83f0ddca85b768500e313c4b998c", "versionType": "git"}, {"status": "affected", "version": "4381a36abdf1c5c0323c1c51f869dc000115eb20", "lessThan": "61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4", "versionType": "git"}, {"status": "affected", "version": "4381a36abdf1c5c0323c1c51f869dc000115eb20", "lessThan": "08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4", "versionType": "git"}], "programFiles": ["drivers/hwmon/powerz.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.7"}, {"status": "unaffected", "version": "0", "lessThan": "6.7", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.83", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.24", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.14", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0.1", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hwmon/powerz.c"], "defaultStatus": "affected"}]}], "published": "2026-04-24T15:16:32.903", "references": [{"url": "https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nhwmon: (powerz) Fix use-after-free on USB disconnect\n\nAfter powerz_disconnect() frees the URB and releases the mutex, a\nsubsequent powerz_read() call can acquire the mutex and call\npowerz_read_data(), which dereferences the freed URB pointer.\n\nFix by:\n - Setting priv->urb to NULL in powerz_disconnect() so that\n powerz_read_data() can detect the disconnected state.\n - Adding a !priv->urb check at the start of powerz_read_data()\n to return -ENODEV on a disconnected device.\n - Moving usb_set_intfdata() before hwmon registration so the\n disconnect handler can always find the priv pointer."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nhwmon: (powerz) Correcci\u00f3n de uso despu\u00e9s de liberaci\u00f3n en desconexi\u00f3n USB\n\nDespu\u00e9s de que powerz_disconnect() libera el URB y libera el mutex, una llamada posterior a powerz_read() puede adquirir el mutex y llamar a powerz_read_data(), que desreferencia el puntero URB liberado.\n\nSe corrige mediante:\n- Establecer priv -> urb a NULL en powerz_disconnect() para que powerz_read_data() pueda detectar el estado desconectado.\n- A\u00f1adir una comprobaci\u00f3n !priv -> urb al inicio de powerz_read_data() para devolver -ENODEV en un dispositivo desconectado.\n- Mover usb_set_intfdata() antes del registro de hwmon para que el gestor de desconexi\u00f3n siempre pueda encontrar el puntero priv."}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5F48A7A3-A02D-414E-944C-F8E2615861D4", "versionEndExcluding": "6.12.83"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A", "versionEndExcluding": "7.0.1", "versionStartIncluding": "7.0"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}