{"id":"CVE-2026-31582","state":"PUBLISHED","title":"hwmon: (powerz) Fix use-after-free on USB disconnect","description":"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.","publishedAt":"2026-04-24T14:42:12.257Z","updatedAt":"2026-06-14T17:42:10.056Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"c78e1d4e48f23792adaa7c94251e22b0d9700a39","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"9e1b798257f96d2e2a2639830eb71add545ce749","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"7003ae4810ca83f0ddca85b768500e313c4b998c","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]}],"references":["https://git.kernel.org/stable/c/c78e1d4e48f23792adaa7c94251e22b0d9700a39","https://git.kernel.org/stable/c/9e1b798257f96d2e2a2639830eb71add545ce749","https://git.kernel.org/stable/c/7003ae4810ca83f0ddca85b768500e313c4b998c","https://git.kernel.org/stable/c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4","https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31582.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31582","state":"PUBLISHED","datePublished":"2026-04-24T14:42:12.257Z","dateUpdated":"2026-06-14T17:42:10.056Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.119Z"},"containers":{"cna":{"title":"hwmon: (powerz) Fix use-after-free on USB disconnect","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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"c78e1d4e48f23792adaa7c94251e22b0d9700a39","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"9e1b798257f96d2e2a2639830eb71add545ce749","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"7003ae4810ca83f0ddca85b768500e313c4b998c","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4","versionType":"git"},{"version":"4381a36abdf1c5c0323c1c51f869dc000115eb20","status":"affected","lessThan":"08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.7","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.7","versionType":"semver"},{"version":"6.12.83","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.24","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.14","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0.1","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hwmon/powerz.c"]}],"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"},{"url":"https://git.kernel.org/stable/c/08e57f5e1a9067d5fbf33993aa7f51d60b3d13a4"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:42:10.056Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.12.83"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.18.24"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"6.19.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.0.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.7","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}