Vulnerability · Published Mar 20, 2026 · Assigned by Linux
CVE-2026-23271perf: Fix __perf_event_overflow() vs perf_remove_from_context() race
High 7.8
In plain English
A high-severity race condition in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 98.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In the Linux kernel, the following vulnerability has been resolved: perf: Fix __perf_event_overflow() vs perf_remove_from_context() race Make sure that __perf_event_overflow() runs with IRQs disabled for all possible callchains. Specifically the software events can end up running it with only preemption disabled. This opens up a race vs perf_event_exit_event() and friends that will go and free various things the overflow path expects to be present, like the BPF program.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | linux | 6.1.170-1 | DEBIAN-CVE-2026-23271 |
| Debian:13 | linux | 6.12.85-1 | DEBIAN-CVE-2026-23271 |
| Debian:14 | linux | 6.19.8-1 | DEBIAN-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux | 6.8.0-136.136 | USN-8567-1 |
| Ubuntu:24.04:LTS | linux | 6.8.0-136.136 | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-allwinner-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-aws | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1061.64 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-aws | 6.8.0-1061.64 | USN-8595-2 |
| Ubuntu:25.10 | linux-aws | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-aws-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-aws-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-aws-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-aws-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-aws-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1061.64~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-aws-6.8 | 6.8.0-1061.64~22.04.1 | USN-8595-3 |
| Ubuntu:22.04:LTS | linux-azure | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure | 6.8.0-1063.71 | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux-azure | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure-6.11 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-6.8 | 6.8.0-1063.71~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-fde | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure-fde | 6.8.0-1062.69 | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux-azure-fde | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-fde-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure-fde-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-azure-fde-6.8 | 6.8.0-1062.69~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure-nvidia | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-azure-nvidia-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-gcp | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1064.72 | USN-8567-1 |
| Ubuntu:24.04:LTS | linux-gcp | 6.8.0-1064.72 | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux-gcp | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-gcp-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-gcp-6.11 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-gcp-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-gcp-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-gcp-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-gcp-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1064.72~22.04.1 | USN-8567-1 |
| Ubuntu:22.04:LTS | linux-gcp-6.8 | 6.8.0-1064.72~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-gke | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1059.67 | USN-8567-1 |
| Ubuntu:24.04:LTS | linux-gke | 6.8.0-1059.67 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-gkeop | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1046.50 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-gkeop | 6.8.0-1046.50 | USN-8567-1 |
| Ubuntu:22.04:LTS | linux-hwe-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-hwe-6.11 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-hwe-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-hwe-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-hwe-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-hwe-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-hwe-6.8 | 6.8.0-136.136~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-ibm | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1061.62 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-ibm | 6.8.0-1061.62 | USN-8574-3 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1061.62~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-ibm-6.8 | 6.8.0-1061.62~22.04.1 | USN-8574-3 |
| Ubuntu:22.04:LTS | linux-intel-iot-realtime | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-intel-iotg | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-kvm | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-lowlatency | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-136.136.2 | USN-8574-2 |
| Ubuntu:24.04:LTS | linux-lowlatency | 6.8.0-136.136.2 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-lowlatency-hwe-6.11 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-136.136.2~22.04.1 | USN-8574-2 |
| Ubuntu:22.04:LTS | linux-lowlatency-hwe-6.8 | 6.8.0-136.136.2~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-nvidia | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1059.62 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-nvidia | 6.8.0-1059.62 | USN-8596-1 |
| Ubuntu:24.04:LTS | linux-nvidia-6.11 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-nvidia-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-nvidia-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-nvidia-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1059.62~22.04.1 | USN-8596-1 |
| Ubuntu:22.04:LTS | linux-nvidia-6.8 | 6.8.0-1059.62~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1059.62.1 | USN-8596-1 |
| Ubuntu:24.04:LTS | linux-nvidia-lowlatency | 6.8.0-1059.62.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1030.31 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-nvidia-tegra | 6.8.0-1030.31 | USN-8574-3 |
| Ubuntu:22.04:LTS | linux-nvidia-tegra-igx | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-oem-5.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-oem-6.0 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-oem-6.1 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-oem-6.11 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-oem-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-oem-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-oem-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-oem-6.8 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-oracle | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1058.61 | USN-8574-2 |
| Ubuntu:24.04:LTS | linux-oracle | 6.8.0-1058.61 | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux-oracle | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-oracle-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-oracle-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-oracle-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1058.61~22.04.1 | USN-8595-1 |
| Ubuntu:22.04:LTS | linux-oracle-6.8 | 6.8.0-1058.61~22.04.1 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-raspi | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1061.65 | USN-8665-1 |
| Ubuntu:24.04:LTS | linux-raspi | 6.8.0-1061.65 | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux-raspi | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-raspi-realtime | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-realtime | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux-realtime | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-riscv | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:25.10 | linux-riscv | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-riscv-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-riscv-6.14 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-riscv-6.17 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-riscv-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-riscv-6.8 | 6.8.0-136.136~22.04.3 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-starfive-5.19 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-starfive-6.2 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-starfive-6.5 | no fix listed | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-vmware | 6.8.0-1008.8 | UBUNTU-CVE-2026-23271 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1033.34 | USN-8574-3 |
| Ubuntu:24.04:LTS | linux-xilinx | 6.8.0-1033.34 | UBUNTU-CVE-2026-23271 |
| Ubuntu:22.04:LTS | linux-xilinx-zynqmp | no fix listed | UBUNTU-CVE-2026-23271 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | 592903cdcbf606a838056bae6d03fc557806c914 – before 4df1a45819e50993cb351682a6ae8e7ed2d233a0592903cdcbf606a838056bae6d03fc557806c914 – before 4f8d5812337871227bb2c98669a87c306a2f86ef592903cdcbf606a838056bae6d03fc557806c914 – before 5c48fdc4b4623533d86e279f51531a7ba212eb87592903cdcbf606a838056bae6d03fc557806c914 – before 3f89b61dd504c5b6711de9759e053b082f9abf12592903cdcbf606a838056bae6d03fc557806c914 – before bb190628fe5f2a73ba762a9972ba16c5e895f73e592903cdcbf606a838056bae6d03fc557806c914 – before c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae |
| Linux | Linux | 2.6.31 |
Weakness: CWE-362 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
- https://git.kernel.org/stable/c/4df1a45819e50993cb351682a6ae8e7ed2d233a0
- https://git.kernel.org/stable/c/4f8d5812337871227bb2c98669a87c306a2f86ef
- https://git.kernel.org/stable/c/5c48fdc4b4623533d86e279f51531a7ba212eb87
- https://git.kernel.org/stable/c/3f89b61dd504c5b6711de9759e053b082f9abf12
- https://git.kernel.org/stable/c/bb190628fe5f2a73ba762a9972ba16c5e895f73e
- https://git.kernel.org/stable/c/c9bc1753b3cc41d0e01fbca7f035258b5f4db0ae
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html