Home/CVE/Linux Kernel Use-After-Free Vulnerability
CVE

CVE-2024-1086

Linux Kernel Use-After-Free Vulnerability

A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The nft_verdict_init() function allows positive values as drop error within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when NF_DROP is issued with a drop error which resembles NF_ACCEPT. We recommend upgrading past commit f342de4e2f33e0e39165d8639387aa6c19dff660.

HIGH · CVSS 7.8 ⚠ CISA KEV EPSS 0.85264 Ransomware: known
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • Linked to known ransomware campaigns
  • SSVC exploitation status: active
  • EPSS ≥ 0.50 - high probability of exploitation in the next 30 days
  • EPSS percentile: top 1% of all CVEs by exploitation likelihood
  • Public exploit or PoC is available
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0

Required Remediation

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Weakness Classification

Affected Products & Versions

16
linux kernel>= 3.15 and < 5.15.149
linux kernel>= 6.1 and < 6.1.76
linux kernel>= 6.2 and < 6.6.15
linux kernel>= 6.7 and < 6.7.3
linux kernelall versions

Public Exploits & PoCs

2

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve-coordination@google.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD31 Jan 2024 · 01:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.

Vendor Advisories

30
siemens-csafSSA-613116
rhsaRHSA-2024:4075Important
rhsaRHSA-2024:4073Important
rhsaRHSA-2024:4074Important
rhsaRHSA-2024:3805Important
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