{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31582", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.119Z", "datePublished": "2026-04-24T14:42:12.257Z", "dateUpdated": "2026-04-24T14:42:12.257Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-24T14:42:12.257Z"}, "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hwmon/powerz.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c78e1d4e48f23792adaa7c94251e22b0d9700a39", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9e1b798257f96d2e2a2639830eb71add545ce749", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7003ae4810ca83f0ddca85b768500e313c4b998c", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4", "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/hwmon/powerz.c"], "versions": [{"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"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.83"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.24"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.19.14"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "7.0.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39"}, {"url": "https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749"}, {"url": "https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c"}, {"url": "https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4"}], "title": "hwmon: (powerz) Fix use-after-free on USB disconnect", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-31582", "lastModified": "2026-04-24T17:51:40.810", "metrics": {}, "published": "2026-04-24T15:16:32.903", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: hwmon: (powerz) Fix use-after-free on USB disconnect", "id": "2461538", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461538"}, "csaw": false, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel's hwmon subsystem. A local attacker, by disconnecting a USB device, could trigger a use-after-free vulnerability in the powerz driver. This occurs when the driver attempts to access a Universal Serial Bus Request Block (URB) after it has been freed during the disconnect process. This flaw can lead to system instability or a denial of service (DoS)."], "name": "CVE-2026-31582", "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-2026-31582\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31582\nhttps://lore.kernel.org/linux-cve-announce/2026042412-CVE-2026-31582-cf91@gregkh/T"]}

{}