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Vulnerability · Published Oct 28, 2026 · Assigned by Linux

CVE-2026-99160ring-buffer: Do not show buffer_meta for CPUs without a buffer

Unrated

In plain English

A security flaw 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 0.2% (higher than 6% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS )–Not rated
Exploit odds (30 days)0.2%top 93.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Do not show buffer_meta for CPUs without a buffer The per_cpu/cpuN/buffer_meta files are created for every possible CPU, but buffer->buffers[cpu] is only allocated once that CPU comes online. Reading the file of a CPU that never came online dereferences a NULL cpu_buffer in rbm_start(). Fail the open with -ENODEV when the CPU has no buffer, as the other per CPU ring buffer interfaces do.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.12.115-2DEBIAN-CVE-2026-99160
Debian:14linux7.2.13-1DEBIAN-CVE-2026-99160
Ubuntu:26.04:LTSlinuxno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux7.3.0-10.10UBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-awsno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-aws7.3.0-1004.4UBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-aws-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-azureno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-azureno fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-azure-fdeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-fde-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-fde-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-gcpno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-gcp7.3.0-1004.4UBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-gcp-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-gkeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-hwe-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-ibmno fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-nvidiano fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-nvidia-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-nvidia-bosno fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-oem-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-oem-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-oem-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-oracleno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-oracle7.3.0-1004.4UBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-oracle-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-oracle-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-raspino fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-raspi7.3.0-1004.4UBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-realtime7.3.0-10.10.1UBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-99160
Ubuntu:26.10linux-riscv7.3.0-10.10.1UBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-riscv-6.17no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-99160
Ubuntu:24.04:LTSlinux-riscv-7.0no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-99160
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-99160

Affected products (as reported)

VendorProductVersions
Linux Linux 950032ffcee7a43c960951940059afc5a2bdbcbc – before 445bc0e0ed7b3f69b78a0fd8d3a8fdb4e20bc379950032ffcee7a43c960951940059afc5a2bdbcbc – before 8512d0312cc0ea83ca4511b164c29a138bbb0c21950032ffcee7a43c960951940059afc5a2bdbcbc – before ae670c1a24fb5ffb167f26358cf47a5f0abbd670950032ffcee7a43c960951940059afc5a2bdbcbc – before 3f23cae09a4677a3f7c163a68388512cb231ff22
Linux Linux 6.12

References