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Exploited vulnerability · CISA KEV

Is CVE-2018-14634 exploited? Yes: in CISA KEV since 26 Jan 2026

Gociux · Linux Kernel · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2018-14634, Linux Kernel Integer Overflow Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 26 Jan 2026, 2680 days after it was published. It affects Linux Kernel. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 26 Jan 2026
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity7.8CVSS 3.0 · high
US federal due16 Feb 2026BOD 22-01 deadline

What it is

Linux Kernel contains an integer overflow vulnerability in the create_elf_tables() function which could allow an unprivileged local user with access to SUID (or otherwise privileged) binary to escalate their privileges on the system.

VendorLinux (32 exploited CVEs in KEV)
ProductKernel
VulnerabilityLinux Kernel Integer Overflow Vulnerability
WeaknessCWE-190
Published25 Sep 2018
Added to KEV26 Jan 2026
Reported by (CNA)redhat

What to do

  1. Check whether you run it. Look for Kernel in your asset inventory, including appliances and cloud images. Stack check lists every exploited Linux CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 25 Sep 2018.
  4. Get told next time. Email alerts when CISA adds a CVE for Linux.

Other exploited CVEs in Kernel

References

Questions

Is CVE-2018-14634 being exploited?

Yes. CISA added CVE-2018-14634 to the Known Exploited Vulnerabilities catalog on 26 Jan 2026, which means there is reliable evidence of exploitation in the wild.

Is CVE-2018-14634 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2018-14634?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check Linux's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected Kernel and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in January 2026 · Linux scorecard · act-now radar.

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