CVE-2026-23271 | Linux Kernel up to 6.12.76/6.18.16/6.19.6/7.0-rc1 __perf_event_overflow privilege escalation

VDB-352025 · CVE-2026-23271 · GCVE-0-2026-23271 LINUX KERNEL UP TO 6.12.76/6.18.16/6.19.6/7.0-RC1 __PERF_EVENT_OVERFLOW PRIVILEGE ESCALATION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 4.4 $0-$5k 1.68+ Summaryinfo A vulnerability identified as critical has been detected in Linux Kernel up to 6.12.76/6.18.16/6.19.6/7.0-rc1. This vulnerability affects the function __perf_event_overflow. The manipulation leads to an unknown weakness. This vulnerability is referenced as CVE-2026-23271. No exploit is available. You should upgrade the affected component. Detailsinfo A vulnerability was found in Linux Kernel up to 6.12.76/6.18.16/6.19.6/7.0-rc1. It has been rated as critical. The impact remains unknown. The summary by CVE is: In the Linux kernel, the following vulnerability has been resolved: perf: Fix __perf_event_overflow() vs perf_remove_from_context() race Make sure that __perf_event_overflow() runs with IRQs disabled for all possible callchains. Specifically the software events can end up running it with only preemption disabled. This opens up a race vs perf_event_exit_event() and friends that will go and free various things the overflow path expects to be present, like the BPF program. The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-23271 since 01/13/2026. The exploitation is known to be difficult. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/20/2026). Upgrading to version 6.12.77, 6.18.17, 6.19.7 or 7.0-rc2 eliminates this vulnerability. Applying the patch 5c48fdc4b4623533d86e279f51531a7ba212eb87/3f89b61dd504c5b6711de9759e053b082f9abf12/bb190628fe5f2a73ba762a9972ba16c5e895f73e/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae 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 6.18.0 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 6.19.0 6.19.1 6.19.2 6.19.3 6.19.4 6.19.5 6.19.6 7.0-rc1 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: 4.6 VulDB Meta Temp Score: 4.4 VulDB Base Score: 4.6 VulDB Temp Score: 4.4 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: Privilege escalation CWE: Unknown 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 6.12.77/6.18.17/6.19.7/7.0-rc2 Patch: 5c48fdc4b4623533d86e279f51531a7ba212eb87/3f89b61dd504c5b6711de9759e053b082f9abf12/bb190628fe5f2a73ba762a9972ba16c5e895f73e/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae Timelineinfo 01/13/2026 CVE reserved 03/20/2026 +66 days Advisory disclosed 03/20/2026 +0 days VulDB entry created 03/20/2026 +0 days VulDB entry last update Sourcesinfo Vendor: kernel.org Advisory: git.kernel.org Status: Confirmed CVE: CVE-2026-23271 (🔒) GCVE (CVE): GCVE-0-2026-23271 GCVE (VulDB): GCVE-100-352025 Entryinfo Created: 03/20/2026 09:47 Changes: 03/20/2026 09:47 (57) Complete: 🔍 Cache ID: 99:C68:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸