MEDIUM
CVSS 5.5
Published: 2026-06-26
CVE-2026-53289
linux linux_kernel Security Advisory (CVE-2026-53289)
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CyberVault Technical Summary
Analyst SynthesisTechnical analysis, exploit verification, and patch instructions for CVE-2026-53289 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:
ice: fix NULL pointer dereference in ice_reset_all_vfs()
ice_reset_all_vfs() ignores the return value of ice_vf_rebuild_vsi().
When the VSI rebuild fails (e.g. during NVM firmware update via
nvmupdate64e), ice_vsi_rebuild() tears down the VSI on its error path,
leaving txq_map and rxq_map as NULL. The subsequent unconditional call
to ice_vf_post_vsi_rebuild() leads to a NULL pointer dereference in
ice_ena_vf_q_mappings() when it accesses vsi->txq_map[0].
The single-VF reset path in ice_reset_vf() already handles this
correctly by checking the return value of ice_vf_reconfig_vsi() and
skipping ice_vf_post_vsi_rebuild() on failure.
Apply the same pattern to ice_reset_all_vfs(): check the return value
of ice_vf_rebuild_vsi() and skip ice_vf_post_vsi_rebuild() and
ice_eswitch_attach_vf() on failure. The VF is left safely disabled
(ICE_VF_STATE_INIT not set, VFGEN_RSTAT not set to VFACTIVE) and can
be recovered via a VFLR triggered by a PCI reset of the VF
(sysfs reset or driver rebind).
Note that this patch does not prevent the VF VSI rebuild from failing
during NVM update — the underlying cause is firmware being in a
transitional state while the EMP reset is processed, which can cause
Admin Queue commands (ice_add_vsi, ice_cfg_vsi_lan) to fail. This
patch only prevents the subsequent NULL pointer dereference that
crashes the kernel when the rebuild does fail.
crash> bt
PID: 50795 TASK: ff34c9ee708dc680 CPU: 1 COMMAND: "kworker/u512:5"
#0 [ff72159bcfe5bb50] machine_kexec at ffffffffaa8850ee
#1 [ff72159bcfe5bba8] __crash_kexec at ffffffffaaa15fba
#2 [ff72159bcfe5bc68] crash_kexec at ffffffffaaa16540
#3 [ff72159bcfe5bc70] oops_end at ffffffffaa837eda
#4 [ff72159bcfe5bc90] page_fault_oops at ffffffffaa893997
#5 [ff72159bcfe5bce8] exc_page_fault at ffffffffab528595
#6 [ff72159bcfe5bd10] asm_exc_page_fault at ffffffffab600bb2
[exception RIP: ice_ena_vf_q_mappings+0x79]
RIP: ffffffffc0a85b29 RSP: ff72159bcfe5bdc8 RFLAGS: 00010206
RAX: 00000000000f0000 RBX: ff34c9efc9c00000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000010 RDI: ff34c9efc9c00000
RBP: ff34c9efc27d4828 R8: 0000000000000093 R9: 0000000000000040
R10: ff34c9efc27d4828 R11: 0000000000000040 R12: 0000000000100000
R13: 0000000000000010 R14: R15:
ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018
#7 [ff72159bcfe5bdf8] ice_sriov_post_vsi_rebuild at ffffffffc0a85e2e [ice]
#8 [ff72159bcfe5be08] ice_reset_all_vfs at ffffffffc0a920b4 [ice]
#9 [ff72159bcfe5be48] ice_service_task at ffffffffc0a31519 [ice]
#10 [ff72159bcfe5be88] process_one_work at ffffffffaa93dca4
#11 [ff72159bcfe5bec8] worker_thread at ffffffffaa93e9de
#12 [ff72159bcfe5bf18] kthread at ffffffffaa946663
#13 [ff72159bcfe5bf50] ret_from_fork at ffffffffaa8086b9
The panic occurs attempting to dereference the NULL pointer in RDX at
ice_sriov.c:294, which loads vsi->txq_map (offset 0x4b8 in ice_vsi).
The faulting VSI is an allocated slab object but not fully initialized
after a failed ice_vsi_rebuild():
crash> struct ice_vsi 0xff34c9efc27d4828
netdev = 0x0,
rx_rings = 0x0,
tx_rings = 0x0,
q_vectors = 0x0,
txq_map = 0x0,
rxq_map = 0x0,
alloc_txq = 0x10,
num_txq = 0x10,
alloc_rxq = 0x10,
num_rxq = 0x10,
The nvmupdate64e process was performing NVM firmware update:
crash> bt 0xff34c9edd1a30000
PID: 49858 TASK: ff34c9edd1a30000 CPU: 1 COMMAND: "nvmupdate64e"
#0 [ff72159bcd617618] __schedule at ffffffffab5333f8
#4 [ff72159bcd617750] ice_sq_send_cmd at ffffffffc0a35347 [ice]
#5 [ff72159bcd6177a8] ice_sq_send_cmd_retry at ffffffffc0a35b47 [ice]
#6 [ff72159bcd617810] ice_aq_send_cmd at ffffffffc0a38018 [ice]
#7 [ff72159bcd617848] ice_aq_read_nvm at ffffffffc0a40254 [ice]
#8
---truncated---
📊 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
Ready-to-use security scanner signatures, active verification probe skeletons, and remediation playbooks for CVE-2026-53289 impacting linux linux_kernel.
⚡ Nuclei Detection Template (YAML)
cve-2026-53289.yaml
id: cve-2026-53289
info:
name: linux linux_kernel - Security Advisory & Vulnerability Scan
author: cybervault-security-intel
severity: medium
description: |
Automated signature & scanner for CVE-2026-53289 affecting linux linux_kernel.
Evaluation: In the Linux kernel, the following vulnerability has been resolved:
ice: fix NULL pointer dereference in ice_reset_all_vfs()
ice_reset_all_vfs() ign...
reference:
- https://cybervault-cve.pages.dev/cve/CVE-2026-53289
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-2026-53289
cwe-id: CWE-476
tags: cve,cve-2026-53289,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-2026-53289.py
# Proof-of-Concept Exploit & Verification Probe for CVE-2026-53289
# 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-2026-53289 (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-2026-53289.sh
# Recommended Remediation & Patching Commands for CVE-2026-53289
# 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.
Technical Analysis
- ↗ https://git.kernel.org/stable/c/1e9185b13ce57b86844447e092e58abb3be849b1
- ↗ https://git.kernel.org/stable/c/3ad2471e61e9f0c4d25046d08e3d747501c3b0dd
- ↗ https://git.kernel.org/stable/c/429024f3a407e4137aee825c2a6be0aba857937d
- ↗ https://git.kernel.org/stable/c/4c2ac52eeeb672624b06c7a135301d7b8a21d52e
- ↗ https://git.kernel.org/stable/c/54ef02487914c24170c7e1c061e45212dc55365e
❓ Frequently Asked Questions (FAQ) & Remediation Guide
How do I fix CVE-2026-53289 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-2026-53289?
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-2026-53289?
CVE-2026-53289 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)
Explore All Vendors →🏭 linux Security Advisories
📅 Top 2026 Critical & High Severity Flaws
⚡ Active Critical Threats & Zero-Days
Risk Snapshot
5.5
MEDIUM SEVERITY
CVE ID
CVE-2026-53289
Weakness
CWE-476
Vendor
linux
Product
linux_kernel
Published
2026-06-26
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H