CVE-2026-31405 | Linux Kernel up to 7.0-rc2 handle_one_ule_extension out-of-bounds (EUVD-2026-19199)

VDB-355495 · CVE-2026-31405 · EUVD-2026-19199 LINUX KERNEL UP TO 7.0-RC2 HANDLE_ONE_ULE_EXTENSION OUT-OF-BOUNDS HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 3.4 $0-$5k 1.40 Summaryinfo A vulnerability was found in Linux Kernel up to 7.0-rc2. It has been rated as critical. This affects the function handle_one_ule_extension. This manipulation of the argument ule_mandatory_ext_handlers[]/ule_optional_ext_handlers[] causes out-of-bounds. This vulnerability is registered as CVE-2026-31405. No exploit is available. Upgrading the affected component is advised. Detailsinfo A vulnerability has been found in Linux Kernel up to 7.0-rc2 and classified as problematic. Affected by this vulnerability is the function handle_one_ule_extension. The manipulation of the argument ule_mandatory_ext_handlers[]/ule_optional_ext_handlers[] with an unknown input leads to a out-of-bounds vulnerability. The CWE definition for the vulnerability is CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. As an impact it is known to affect confidentiality. The summary by CVE is: In the Linux kernel, the following vulnerability has been resolved: media: dvb-net: fix OOB access in ULE extension header tables The ule_mandatory_ext_handlers[] and ule_optional_ext_handlers[] tables in handle_one_ule_extension() are declared with 255 elements (valid indices 0-254), but the index htype is derived from network-controlled data as (ule_sndu_type & 0x00FF), giving a range of 0-255. When htype equals 255, an out-of-bounds read occurs on the function pointer table, and the OOB value may be called as a function pointer. Add a bounds check on htype against the array size before either table is accessed. Out-of-range values now cause the SNDU to be discarded. It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2026-31405 since 03/09/2026. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/06/2026). Upgrading to version 6.1.167, 6.6.130, 6.12.78, 6.18.19, 6.19.9 or 7.0-rc3 eliminates this vulnerability. Applying the patch 29ef43ceb121d67b87f4cbb08439e4e9e732eff8/1a6da3dbb9985d00743073a1cc1f96e59f5abc30/145e50c2c700fa52b840df7bab206043997dd18e/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe/f2b65dcb78c8990e4c68a906627433be1fe38a92/24d87712727a5017ad142d63940589a36cd25647 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. The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-19199). Productinfo Type Operating System Vendor Linux Name Kernel Version 6.1.166 6.6.129 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 6.18.0 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 6.19.0 6.19.1 6.19.2 6.19.3 6.19.4 6.19.5 6.19.6 6.19.7 6.19.8 7.0-rc1 7.0-rc2 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: 3.5 VulDB Meta Temp Score: 3.4 VulDB Base Score: 3.5 VulDB Temp Score: 3.4 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: Out-of-bounds CWE: CWE-125 / 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 6.1.167/6.6.130/6.12.78/6.18.19/6.19.9/7.0-rc3 Patch: 29ef43ceb121d67b87f4cbb08439e4e9e732eff8/1a6da3dbb9985d00743073a1cc1f96e59f5abc30/145e50c2c700fa52b840df7bab206043997dd18e/8bde543d2a5f935ba2a6a6325a2e02f8a9256fbe/f2b65dcb78c8990e4c68a906627433be1fe38a92/24d87712727a5017ad142d63940589a36cd25647 Timelineinfo 03/09/2026 CVE reserved 04/06/2026 +27 days Advisory disclosed 04/06/2026 +0 days VulDB entry created 04/06/2026 +0 days VulDB entry last update Sourcesinfo Vendor: kernel.org Advisory: git.kernel.org Status: Confirmed CVE: CVE-2026-31405 (🔒) GCVE (CVE): GCVE-0-2026-31405 GCVE (VulDB): GCVE-100-355495 EUVD: 🔒 Entryinfo Created: 04/06/2026 10:20 Updated: 04/06/2026 12:30 Changes: 04/06/2026 10:20 (59), 04/06/2026 12:30 (1) Complete: 🔍 Cache ID: 99:546:101 Discussion No comments yet. 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