CVE-2026-72215: Linux kernel · MIPS: DEC: Ensure 32-bit stack location for o32 prom_printf()
Affects Linux kernelSource GCVE Database
Not known to be exploited · fixed in 5.15.0-1117.124~20.04.1 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 14:05 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 12% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 5.15.0-1117.124~20.04.1, 5.15.0-1123.132~20.04.1, 5.15.0-1122.131~20.04.1 +41
Exploitation evidence
Disclosed: evidence found.
CVE published 15 Aug 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in
|
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther 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 patch is available that addresses this issue by ensuring the stack pointer is correctly handled in the prom_printf() call path on MIPS 64-bit kernels. Users should apply the official Linux kernel updates that include this fix. No additional mitigation is required as the patch fully resolves the problem.
Description
A vulnerability in the Linux kernel MIPS architecture was resolved involving the prom_printf() firmware entry point. In 64-bit configurations, calling prom_printf() from kernel threads other than the initial one caused the stack pointer to be incorrectly handled due to 32-bit ALU operations on 64-bit data, leading to kernel hangs during early boot. The fix ensures the stack is switched to a 32-bit compatible memory segment when calling prom_printf(), preventing this issue. This vulnerability affects specific Linux kernel versions and has been patched.
References
- nvd.nist.gov/vuln/detail/CVE-2026-72215 (opens in a new tab)
- git.kernel.org/stable/c/1ed18b5c3be9657fe288fa4dae0bef2470598683 (opens in a new tab)
- git.kernel.org/stable/c/27857db30c98583e12dd8d939ba2370bce08a5be (opens in a new tab)
- git.kernel.org/stable/c/3394757c5d3970ab36d2aafa6dd40952b43f0d16 (opens in a new tab)
- git.kernel.org/stable/c/3ae86630b94f72bf4012c6322f81f622dc4fdf24 (opens in a new tab)
- git.kernel.org/stable/c/5ff79e8bdc75db51e30298a75939e2308e7658e0 (opens in a new tab)
- git.kernel.org/stable/c/9cd4a8ed12d2a6313592e43c14cca5eca6717bee (opens in a new tab)
- git.kernel.org/stable/c/d3fd2d358df0ca712183509cbbed6a16bde1d17e (opens in a new tab)
- git.kernel.org/stable/c/d828bca84311e278093e60b2864a54f4bbb0c2ad (opens in a new tab)
- ubuntu.com/security/CVE-2026-72215 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-72215 (opens in a new tab)
- git.kernel.org/linus/5ff79e8bdc75db51e30298a75939e2308e7658e0 (opens in a new tab)
- ubuntu.com/security/notices/USN-8876-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8878-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8879-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8877-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8875-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8889-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8887-1 (opens in a new tab)
- ubuntu.com/security/notices/USN-8888-2 (opens in a new tab)