CVE-2026-93227: Linux kernel · mm/mm_init: deferred_grow_zone(): fix out-of-range first_deferred_pfn
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in 97090500d776c3f6d08e857e3a0a7cf092999094 : patch Linux kernel soon.
Data as of 26 Oct 2026, 14:05 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 97090500d776c3f6d08e857e3a0a7cf092999094, 84339578c2d6936ac3a93cd1f0bbaa3468a988f2, 45489d4f95802903ab35799b400b346fa4e13151
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 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 Linux kernel to 97090500d776c3f6d08e857e3a0a7cf092999094, 84339578c2d6936ac3a93cd1f0bbaa3468a988f2 or 45489d4f95802903ab35799b400b346fa4e13151.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
AI-suggested
A fix has been implemented in the Linux kernel source as indicated by the fixed commit versions. Users should update to a kernel version that includes these fixes to prevent the kernel panic. No other mitigation or workaround is indicated. Since this is a kernel-level issue, applying the official patch or upgrading the kernel is the recommended remediation.
Description
A vulnerability in the Linux kernel's memory initialization code (deferred_grow_zone) can cause an out-of-range pointer update (first_deferred_pfn) when CONFIG_DEFERRED_STRUCT_PAGE_INIT and CONFIG_CMA are enabled. This leads to a kernel panic during boot due to a BUG_ON() triggered by accessing memory beyond the node's range. The issue occurs when a large CMA reservation causes the memory map initialization to fall short, but the tracking pointer overflows past the node's memory end.