What’s Vulnerable › Vulnerabilities

CVE-2026-72309: tracing/remotes: Fix leak in trace_remote_alloc_buffer() error path

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: tracing/remotes: Fix leak in trace_remote_alloc_buffer() error path If page allocation fails in trace_remote_alloc_buffer(), desc->nr_cpus is not yet incremented for the current CPU. As a consequence, on error, half-allocated rb_desc will not be freed in trace_remote_free_buffer(). Increment desc->nr_cpus as soon as the first allocation for the current CPU has succeeded.

Affected products

• Linux kernel: 7.1 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/81a7b7ddb07efdd8cf30eac6def18b9289b8de1e
• https://git.kernel.org/stable/c/ec082d0b978b5fb4c11205ccce63587ac94c74e1

Get alerted when CVE-2026-72309 or the next vulnerability affects your stack