Are Linux servers safe right now?
1 flaw was added to CISA's list of actively exploited vulnerabilities in the last 30 days. If you run Linux servers, update now.
Exploited in the last 90 days
- KernelLinux Kernel Missing Initialization of a Variable Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
- KernelLinux Kernel Out-of-Bounds Write Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
- KernelLinux Kernel Race Condition Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
- KernelLinux Kernel Improper Check for Unusual or Exceptional Conditions Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
- KernelLinux Kernel Unspecified Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
- KernelLinux Kernel Out-of-Bounds Write Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
- Automatic Bug Reporting ToolRed Hat Automatic Bug Reporting Tool Privilege Escalation Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
- LibuserRed Hat Libuser Race Condition Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
Earlier exploited flaws
- Linux Kernel Improper Authentication Vulnerability
- Linux Kernel Incorrect Resource Transfer Between Spheres Vulnerability
- GNU InetUtils Argument Injection Vulnerability Zero-day
- Linux Kernel Integer Overflow Vulnerability
- Linux Kernel Heap Out-of-Bounds Write Vulnerability
- GNU Bash OS Command Injection Vulnerability
- Linux Kernel Time-of-Check Time-of-Use (TOCTOU) Race Condition Vulnerability
- Linux Kernel Improper Ownership Management Vulnerability
- Linux Kernel Out-of-Bounds Access Vulnerability
- Linux Kernel Out-of-Bounds Read Vulnerability
- Linux Kernel Use of Uninitialized Resource Vulnerability
- Linux Kernel Out-of-Bounds Write Vulnerability
- Linux Kernel PIE Stack Buffer Corruption Vulnerability
- Linux Kernel Heap-Based Buffer Overflow Vulnerability
- Linux Kernel Use-After-Free Vulnerability
By year
| Year | Exploited flaws added | Zero-days |
|---|---|---|
| 2026 (so far) | 12 | 1 |
| 2025 | 8 | 0 |
| 2024 | 4 | 0 |
| 2023 | 5 | 0 |
| 2022 | 12 | 0 |
Questions
Are Linux servers safe right now?
1 flaw was added to CISA's list of actively exploited vulnerabilities in the last 30 days. If you run Linux servers, update now. Confirm with the vendor's own advisories and install updates as soon as they're available.
How many Linux servers vulnerabilities have been exploited?
44 flaws are on CISA's list of vulnerabilities known to be exploited in real attacks, 6 of them used by ransomware.
Covers products matching linux, red hat, ubuntu, debian, gnu bash, inetutils. Sources: CISA's Known Exploited Vulnerabilities catalog and the vendors' own advisories. Updated every hour. General information only; confirm details with the vendor.