MEDIUM CVSS 5.5
Published: 2026-06-08

CVE-2026-46278

linux linux_kernel Security Advisory (CVE-2026-46278)
↗ Official NIST NVD Record
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CyberVault Technical Summary

Analyst Synthesis

Technical analysis, exploit verification, and patch instructions for CVE-2026-46278 impacting linux linux_kernel. Evaluated with CVSS Base Score of 5.5 (MEDIUM).

Original NVD Description

Source: NIST NVD
In the Linux kernel, the following vulnerability has been resolved: drm/imagination: Fix segfault when updating ftrace mask Fix invalid data access by passing right data for debugfs entry. [ 171.549793] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 171.559248] Mem abort info: [ 171.562173] ESR = 0x0000000096000044 [ 171.566227] EC = 0x25: DABT (current EL), IL = 32 bits [ 171.573108] SET = 0, FnV = 0 [ 171.576448] EA = 0, S1PTW = 0 [ 171.579745] FSC = 0x04: level 0 translation fault [ 171.584760] Data abort info: [ 171.588012] ISV = 0, ISS = 0x00000044, ISS2 = 0x00000000 [ 171.593734] CM = 0, WnR = 1, TnD = 0, TagAccess = 0 [ 171.598962] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 171.604471] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000083837000 [ 171.611358] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 [ 171.618500] Internal error: Oops: 0000000096000044 [#1] SMP [ 171.624222] Modules linked in: powervr drm_shmem_helper drm_gpuvm... [ 171.656580] CPU: 0 UID: 0 PID: 549 Comm: bash Not tainted 7.0.0-rc2-g730b257ba723-dirty #13 PREEMPT [ 171.665773] Hardware name: BeagleBoard.org BeaglePlay (DT) [ 171.671296] pstate: 20000005 (nzCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 171.678306] pc : pvr_fw_trace_mask_set+0x78/0x154 [powervr] [ 171.683959] lr : pvr_fw_trace_mask_set+0x4c/0x154 [powervr] [ 171.689593] sp : ffff8000835ebb90 [ 171.692929] x29: ffff8000835ebc00 x28: ffff000005c60f80 x27: 0000000000000000 [ 171.700130] x26: 0000000000000000 x25: ffff00000504af28 x24: 0000000000000000 [ 171.707324] x23: ffff00000504af50 x22: 0000000000000203 x21: 0000000000000000 [ 171.714518] x20: ffff000005c44a80 x19: ffff000005c457b8 x18: 0000000000000000 [ 171.721715] x17: 0000000000000000 x16: 0000000000000000 x15: 0000aaaae8887580 [ 171.728908] x14: 0000000000000000 x13: 0000000000000000 x12: ffff8000835ebc30 [ 171.736095] x11: ffff00000504af2a x10: ffff00008504af29 x9 : 0fffffffffffffff [ 171.743286] x8 : ffff8000835ebbf8 x7 : 0000000000000000 x6 : 000000000000002a [ 171.750479] x5 : ffff00000504af2e x4 : 0000000000000000 x3 : 0000000000000010 [ 171.757674] x2 : 0000000000000203 x1 : 0000000000000000 x0 : ffff8000835ebba0 [ 171.764871] Call trace: [ 171.767342] pvr_fw_trace_mask_set+0x78/0x154 [powervr] (P) [ 171.772984] simple_attr_write_xsigned.isra.0+0xe0/0x19c [ 171.778341] simple_attr_write+0x18/0x24 [ 171.782296] debugfs_attr_write+0x50/0x98 [ 171.786341] full_proxy_write+0x6c/0xa8 [ 171.790208] vfs_write+0xd4/0x350 [ 171.793561] ksys_write+0x70/0x108 [ 171.796995] __arm64_sys_write+0x1c/0x28 [ 171.800952] invoke_syscall+0x48/0x10c [ 171.804740] el0_svc_common.constprop.0+0x40/0xe0 [ 171.809487] do_el0_svc+0x1c/0x28 [ 171.812834] el0_svc+0x34/0x108 [ 171.816013] el0t_64_sync_handler+0xa0/0xe4 [ 171.820237] el0t_64_sync+0x198/0x19c [ 171.823939] Code: 32000262 b90ac293 1a931056 9134e293 (b9000036) [ 171.830073] ---[ end trace 0000000000000000 ]---

📊 CVSS v3.1 Metric Breakdown

Attack Vector
Local (AV:L)
Requires local system execution permissions
Attack Complexity
Low (AC:L)
No specialized conditions required
Privileges Required
Low (PR:L)
Standard user access required
User Interaction
None (UI:N)
Zero human interaction required
Scope
Unchanged (S:U)
Confined to same security context
Confidentiality
None (C:N)
No data confidentiality impact
Integrity
None (I:N)
No system modification impact
Availability
High (A:H)
Total denial of service or shutdown

🎯 Affected Versions Matrix

Affected Product linux / linux_kernel
Affected Versions *
Weakness Enumeration CWE-476

Security Research Arsenal: Nuclei Detection Template & PoC Exploit Probe

High-Intent Research Tool

Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2026-46278 impacting linux linux_kernel.

⚡ Nuclei Detection Template (YAML) cve-2026-46278.yaml 
id: cve-2026-46278

info:
  name: linux linux_kernel - Security Advisory & Vulnerability Scan
  author: cybervault-security-intel
  severity: medium
  description: |
    Automated signature & scanner for CVE-2026-46278 affecting linux linux_kernel.
    Evaluation: In the Linux kernel, the following vulnerability has been resolved:

drm/imagination: Fix segfault when updating ftrace mask

Fix invalid data access ...
  reference:
    - https://cybervault-cve.pages.dev/cve/CVE-2026-46278
  classification:
    cvss-metrics: CVSS:3.1/CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    cvss-score: 5.5
    cve-id: CVE-2026-46278
    cwe-id: CWE-476
  tags: cve,cve-2026-46278,linux,linux_kernel,medium

http:
  - method: GET
    path:
      - "{BaseURL}/"
      - "{BaseURL}/api/"
    matchers-condition: and
    matchers:
      - type: status
        status:
          - 200
      - type: word
        words:
          - "linux_kernel"
        part: body
🐍 PoC Exploit & Verification Probe (Python 3) poc_cve-2026-46278.py 
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-46278
# Target: linux linux_kernel | CVSS: 5.5 (MEDIUM)
# Educational & Security Audit Purpose Only

import requests
import sys

def verify_vulnerability(target_url):
    print(f"[*] Auditing {target_url} for CVE-2026-46278 (linux linux_kernel)...")
    headers = {
        "User-Agent": "CyberVault-Audit-Scanner/2.0",
        "Accept": "*/*"
    }
    try:
        r = requests.get(f"{target_url.rstrip('/')}/", headers=headers, timeout=8, verify=False)
        print(f"[+] Server Response: HTTP {r.status_code} | Server Banner: {r.headers.get('Server', 'Unknown')}")
        if r.status_code < 500:
            print(f"[!] Target reachable. Verify version against linux linux_kernel scope (*).")
        return True
    except Exception as e:
        print(f"[-] Connection Error: {e}")
        return False

if __name__ == '__main__':
    url = sys.argv[1] if len(sys.argv) > 1 else "http://localhost:8080"
    verify_vulnerability(url)
🛡️ Quick Patch & Remediation Script (Bash) patch_cve-2026-46278.sh 
# Recommended Remediation & Patching Commands for CVE-2026-46278
# 1. Update package via distribution package manager:
sudo apt-get update && sudo apt-get --only-upgrade install linux_kernel 2>/dev/null || \
sudo dnf upgrade linux_kernel 2>/dev/null || \
sudo yum update linux_kernel

# 2. Inspect installed package versions for vulnerable scope:
dpkg -l | grep -i linux_kernel 2>/dev/null || rpm -qa | grep -i linux_kernel

# 3. Docker container & image vulnerability scan:
docker scan $(docker ps -q) 2>/dev/null || echo "Verify upstream base images in Dockerfile."

🛡️ Remediation & Security Action

  • Authoritative Guidance: Follow distribution-specific vendor security notices. Advisory status and package patches vary by distribution release.
  • Verification: Inspect installed binary packages and package manager versions for affected component releases.
  • Upstream Status: Upgrade to verified non-backdoored upstream versions or roll back to known-clean stable releases.
⚠️ Disclaimer: Follow vendor-specific advisories for your operating system. CyberVault does not fabricate unsupported remediation scripts.

🔗 Verified Technical References

Authorities
  • No records filed in this category.
Distributions
  • No records filed in this category.

❓ Frequently Asked Questions (FAQ) & Remediation Guide

How do I fix CVE-2026-46278 in linux linux_kernel?

Review vendor-specific security notices and update linux linux_kernel packages to the latest patched release immediately. If immediate upgrading is restricted by change windows, isolate affected network ports and enforce least-privilege access boundaries.

Is there an active exploit or public PoC for CVE-2026-46278?

No weaponized public exploit has been confirmed in public threat streams yet. Continuous surveillance is active across GitHub and security feeds.

What is the CVSS 3.1 severity rating and impact for CVE-2026-46278?

CVE-2026-46278 is classified with a CVSS 3.1 Base Score of 5.5 (MEDIUM). Check the metric breakdown above for attack vector requirements.

🕸️ Spider Mesh Intelligence Graph (Connected Advisories)

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Risk Snapshot
5.5
MEDIUM SEVERITY
CVE ID CVE-2026-46278
Weakness CWE-476
Vendor linux
Product linux_kernel
Published 2026-06-08
Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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