CVE-2026-23268 | Linux Kernel up to 6.12.76/6.18.17/6.19.7/7.0-rc3 Apparmorfs Interface permission (EUVD-2026-12910)

VDB-351581 · CVE-2026-23268 · EUVD-2026-12910 LINUX KERNEL UP TO 6.12.76/6.18.17/6.19.7/7.0-RC3 APPARMORFS INTERFACE PERMISSION HISTORYDIFFRELATEJSONXMLCTI CVSS Meta Temp Score Current Exploit Price (≈) CTI Interest Score 7.5 $0-$5k 0.25+ Summaryinfo A vulnerability classified as critical has been found in Linux Kernel up to 6.12.76/6.18.17/6.19.7/7.0-rc3. Affected is an unknown function of the component Apparmorfs Interface. The manipulation leads to permission. This vulnerability is documented as CVE-2026-23268. The attack needs to be performed locally. There is not any exploit available. It is recommended to upgrade the affected component. Detailsinfo A vulnerability was found in Linux Kernel up to 6.12.76/6.18.17/6.19.7/7.0-rc3 and classified as critical. This issue affects some unknown processing of the component Apparmorfs Interface. The manipulation with an unknown input leads to a permission vulnerability. Using CWE to declare the problem leads to CWE-275. Impacted is confidentiality, integrity, and availability. The summary by CVE is: In the Linux kernel, the following vulnerability has been resolved: apparmor: fix unprivileged local user can do privileged policy management An unprivileged local user can load, replace, and remove profiles by opening the apparmorfs interfaces, via a confused deputy attack, by passing the opened fd to a privileged process, and getting the privileged process to write to the interface. This does require a privileged target that can be manipulated to do the write for the unprivileged process, but once such access is achieved full policy management is possible and all the possible implications that implies: removing confinement, DoS of system or target applications by denying all execution, by-passing the unprivileged user namespace restriction, to exploiting kernel bugs for a local privilege escalation. The policy management interface can not have its permissions simply changed from 0666 to 0600 because non-root processes need to be able to load policy to different policy namespaces. Instead ensure the task writing the interface has privileges that are a subset of the task that opened the interface. This is already done via policy for confined processes, but unconfined can delegate access to the opened fd, by-passing the usual policy check. The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-23268 since 01/13/2026. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 03/18/2026). MITRE ATT&CK project uses the attack technique T1222 for this issue. Upgrading to version 6.12.77, 6.18.18, 6.19.8 or 7.0-rc4 eliminates this vulnerability. Applying the patch 0fc63dd9170643d15c25681fca792539e23f4640/b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6/b6a94eeca9c6c8f7c55ad44c62c98324f51ec596/6601e13e82841879406bf9f369032656f441a425 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-2026-12910). 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 6.18.17 6.19.0 6.19.1 6.19.2 6.19.3 6.19.4 6.19.5 6.19.6 6.19.7 7.0-rc1 7.0-rc2 7.0-rc3 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: 7.8 VulDB Meta Temp Score: 7.5 VulDB Base Score: 7.8 VulDB Temp Score: 7.5 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: Permission CWE: CWE-275 / CWE-266 CAPEC: 🔒 ATT&CK: 🔒 Physical: Partially Local: Yes Remote: No 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 6.12.77/6.18.18/6.19.8/7.0-rc4 Patch: 0fc63dd9170643d15c25681fca792539e23f4640/b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6/b6a94eeca9c6c8f7c55ad44c62c98324f51ec596/6601e13e82841879406bf9f369032656f441a425 Timelineinfo 01/13/2026 CVE reserved 03/18/2026 +64 days Advisory disclosed 03/18/2026 +0 days VulDB entry created 03/18/2026 +0 days VulDB entry last update Sourcesinfo Vendor: kernel.org Advisory: git.kernel.org Status: Confirmed CVE: CVE-2026-23268 (🔒) GCVE (CVE): GCVE-0-2026-23268 GCVE (VulDB): GCVE-100-351581 EUVD: 🔒 Entryinfo Created: 03/18/2026 19:55 Updated: 03/18/2026 20:40 Changes: 03/18/2026 19:55 (58), 03/18/2026 20:40 (1) Complete: 🔍 Cache ID: 99:458:101 Discussion No comments yet. Languages: en. Please log in to comment. ◂ PreviousOverviewNext ▸