CVE-2026-31582 | Linux Kernel up to 6.12.82/6.18.23/6.19.13/7.0.0 hwmon powerz_disconnect use after free

VDB-359383 · CVE-2026-31582 · GCVE-0-2026-31582 LINUX KERNEL UP TO 6.12.82/6.18.23/6.19.13/7.0.0 HWMON POWERZ_DISCONNECT USE AFTER FREE HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.6 $5k-$25k 0.00+ Summaryinfo A vulnerability has been found in Linux Kernel up to 6.12.82/6.18.23/6.19.13/7.0.0 and classified as critical. This affects the function powerz_disconnect of the component hwmon. This manipulation causes use after free. This vulnerability appears as CVE-2026-31582. There is no available exploit. The affected component should be upgraded. Detailsinfo A vulnerability has been found in Linux Kernel up to 6.12.82/6.18.23/6.19.13/7.0.0 and classified as critical. Affected by this vulnerability is the function powerz_disconnect of the component hwmon. The manipulation with an unknown input leads to a use after free vulnerability. The CWE definition for the vulnerability is CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is: In the Linux kernel, the following vulnerability has been resolved: hwmon: (powerz) Fix use-after-free on USB disconnect After powerz_disconnect() frees the URB and releases the mutex, a subsequent powerz_read() call can acquire the mutex and call powerz_read_data(), which dereferences the freed URB pointer. Fix by: - Setting priv->urb to NULL in powerz_disconnect() so that powerz_read_data() can detect the disconnected state. - Adding a !priv->urb check at the start of powerz_read_data() to return -ENODEV on a disconnected device. - Moving usb_set_intfdata() before hwmon registration so the disconnect handler can always find the priv pointer. It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-31582 since 03/09/2026. The exploitation appears to be easy. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/24/2026). Upgrading to version 6.12.83, 6.18.24, 6.19.14 or 7.0.1 eliminates this vulnerability. Applying the patch c78e1d4e48f23792adaa7c94251e22b0d9700a39/9e1b798257f96d2e2a2639830eb71add545ce749/7003ae4810ca83f0ddca85b768500e313c4b998c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version. Productinfo Type Operating System Vendor Linux Name Kernel Version 6.12.0 6.12.1 6.12.2 6.12.3 6.12.4 6.12.5 6.12.6 6.12.7 6.12.8 6.12.9 6.12.10 6.12.11 6.12.12 6.12.13 6.12.14 6.12.15 6.12.16 6.12.17 6.12.18 6.12.19 6.12.20 6.12.21 6.12.22 6.12.23 6.12.24 6.12.25 6.12.26 6.12.27 6.12.28 6.12.29 6.12.30 6.12.31 6.12.32 6.12.33 6.12.34 6.12.35 6.12.36 6.12.37 6.12.38 6.12.39 6.12.40 6.12.41 6.12.42 6.12.43 6.12.44 6.12.45 6.12.46 6.12.47 6.12.48 6.12.49 6.12.50 6.12.51 6.12.52 6.12.53 6.12.54 6.12.55 6.12.56 6.12.57 6.12.58 6.12.59 6.12.60 6.12.61 6.12.62 6.12.63 6.12.64 6.12.65 6.12.66 6.12.67 6.12.68 6.12.69 6.12.70 6.12.71 6.12.72 6.12.73 6.12.74 6.12.75 6.12.76 6.12.77 6.12.78 6.12.79 6.12.80 6.12.81 6.12.82 6.18.0 6.18.1 6.18.2 6.18.3 6.18.4 6.18.5 6.18.6 6.18.7 6.18.8 6.18.9 6.18.10 6.18.11 6.18.12 6.18.13 6.18.14 6.18.15 6.18.16 6.18.17 6.18.18 6.18.19 6.18.20 6.18.21 6.18.22 6.18.23 6.19.0 6.19.1 6.19.2 6.19.3 6.19.4 6.19.5 6.19.6 6.19.7 6.19.8 6.19.9 6.19.10 6.19.11 6.19.12 6.19.13 7.0 License open-source Website Vendor: https://www.kernel.org/ CPE 2.3info 🔒 🔒 🔒 CPE 2.2info 🔒 🔒 🔒 CVSSv4info VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv3info VulDB Meta Base Score: 8.0 VulDB Meta Temp Score: 7.6 VulDB Base Score: 8.0 VulDB Temp Score: 7.6 VulDB Vector: 🔒 VulDB Reliability: 🔍 CVSSv2info Vector Complexity Authentication Confidentiality Integrity Availability Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock Unlock VulDB Base Score: 🔒 VulDB Temp Score: 🔒 VulDB Reliability: 🔍 Exploitinginfo Class: Use after free CWE: CWE-416 / CWE-119 CAPEC: 🔒 ATT&CK: 🔒 Physical: No Local: No Remote: Partially Availability: 🔒 Status: Not defined Price Prediction: 🔍 Current Price Estimation: 🔒 0-Day Unlock Unlock Unlock Unlock Today Unlock Unlock Unlock Unlock Threat Intelligenceinfo Interest: 🔍 Active Actors: 🔍 Active APT Groups: 🔍 Countermeasuresinfo Recommended: Upgrade Status: 🔍 0-Day Time: 🔒 Upgrade: Kernel 6.12.83/6.18.24/6.19.14/7.0.1 Patch: c78e1d4e48f23792adaa7c94251e22b0d9700a39/9e1b798257f96d2e2a2639830eb71add545ce749/7003ae4810ca83f0ddca85b768500e313c4b998c/61f2aa23b0ce8d7aa5071ed25a7471e246a4fdd4 Timelineinfo 03/09/2026 CVE reserved 04/24/2026 +45 days Advisory disclosed 04/24/2026 +0 days VulDB entry created 04/24/2026 +0 days VulDB entry last update Sourcesinfo Vendor: kernel.org Advisory: git.kernel.org Status: Confirmed CVE: CVE-2026-31582 (🔒) GCVE (CVE): GCVE-0-2026-31582 GCVE (VulDB): GCVE-100-359383 Entryinfo Created: 04/24/2026 17:48 Changes: 04/24/2026 17:48 (59) Complete: 🔍 Cache ID: 99:EF6:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸