CVE-2026-23415 Vulnerability Analysis & Exploit Details

CVE-2026-23415
Vulnerability Scoring

7.8
/10
Very High Risk

Highly exploitable, CVE-2026-23415 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2026-23415 Details

Status: Modified

Last updated: 🕑 27 Apr 2026, 14:16 UTC
Originally published on: 🕛 02 Apr 2026, 12:16 UTC

Time between publication and last update: 25 days

CVSS Release: version 3

CVSS3 Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS3 Type

Secondary

CVSS3 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVE-2026-23415 Vulnerability Summary

CVE-2026-23415: In the Linux kernel, the following vulnerability has been resolved: futex: Fix UaF between futex_key_to_node_opt() and vma_replace_policy() During futex_key_to_node_opt() execution, vma->vm_policy is read under speculative mmap lock and RCU. Concurrently, mbind() may call vma_replace_policy() which frees the old mempolicy immediately via kmem_cache_free(). This creates a race where __futex_key_to_node() dereferences a freed mempolicy pointer, causing a use-after-free read of mpol->mode. [ 151.412631] BUG: KASAN: slab-use-after-free in __futex_key_to_node (kernel/futex/core.c:349) [ 151.414046] Read of size 2 at addr ffff888001c49634 by task e/87 [ 151.415969] Call Trace: [ 151.416732] __asan_load2 (mm/kasan/generic.c:271) [ 151.416777] __futex_key_to_node (kernel/futex/core.c:349) [ 151.416822] get_futex_key (kernel/futex/core.c:374 kernel/futex/core.c:386 kernel/futex/core.c:593) Fix by adding rcu to __mpol_put().

Assessing the Risk of CVE-2026-23415

Access Complexity Graph

The exploitability of CVE-2026-23415 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2026-23415

CVE-2026-23415 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation risks.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2026-23415, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2026-23415, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2026-23415 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2026-23415 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: High
    CVE-2026-23415 can disrupt system operations, potentially causing complete denial of service (DoS).

CVE-2026-23415 References

External References

CWE Common Weakness Enumeration

CWE-416

Vulnerable Configurations

  • cpe:2.3:o:linux:linux_kernel:6.16.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:rc7:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.12:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.12:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.17:rc7:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.17:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.2:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.2:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.5:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.5:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.11:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.11:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.13:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.13:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.14:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.14:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.16:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.16:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.17:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.17:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.18:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.18:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.19:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.19:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.18.20:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.18.20:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.1:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.1:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.3:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.3:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.4:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.4:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.6:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.6:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.7:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.7:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.8:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.8:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.9:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.9:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.19.10:*:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.19.10:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.16:-:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:6.16:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*
    cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*

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