CVE-2026-72309: Linux kernel · tracing/remotes: Fix leak in trace_remote_alloc_buffer() error path
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 9 Nov 2026, 14:04 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSlinux-aws-6.14pkg:deb/ubuntu/linux-aws-6.14?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-aws-6.17pkg:deb/ubuntu/linux-aws-6.17?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.11pkg:deb/ubuntu/linux-azure-6.11?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.14pkg:deb/ubuntu/linux-azure-6.14?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-6.17pkg:deb/ubuntu/linux-azure-6.17?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSlinux-azure-fde-6.14pkg:deb/ubuntu/linux-azure-fde-6.14?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented in the Linux kernel to address this issue. Users should apply the updated kernel versions that include this patch. No additional mitigation steps are indicated.
Description
A memory leak vulnerability in the Linux kernel's tracing/remotes subsystem was fixed. The issue occurred in the trace_remote_alloc_buffer() function when page allocation failed, causing incomplete cleanup of partially allocated buffers. This was due to the desc->nr_cpus counter not being incremented before the failure, preventing proper freeing of resources in the error path.
References
- ubuntu.com/security/CVE-2026-72309 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72309 (opens in a new tab)
- git.kernel.org/linus/ec082d0b978b5fb4c11205ccce63587ac94c74e1 (opens in a new tab)
- git.kernel.org/stable/c/81a7b7ddb07efdd8cf30eac6def18b9289b8de1e (opens in a new tab)
- git.kernel.org/stable/c/ec082d0b978b5fb4c11205ccce63587ac94c74e1 (opens in a new tab)