CVE-2026-93266: Linux kernel · arm64: RSI: fix field-spanning write warning in attestation token init
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in e505092cb200d430d5b8d8d3e926d45f29474ba3 : update Linux kernel when convenient.
Data as of 26 Oct 2026, 13:46 UTC
Rated Medium 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 e505092cb200d430d5b8d8d3e926d45f29474ba3, d29a8ee271da17b5e32d7a76a9c78d43f66447ca, 221049874b6a78c7d87bc826581b0695cd338e2b
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 e505092cb200d430d5b8d8d3e926d45f29474ba3, d29a8ee271da17b5e32d7a76a9c78d43f66447ca or 221049874b6a78c7d87bc826581b0695cd338e2b.
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
This issue has been fixed in the Linux kernel. Users should apply the patches identified by the fixed commit hashes (e505092cb200d430d5b8d8d3e926d45f29474ba3, d29a8ee271da17b5e32d7a76a9c78d43f66447ca, 221049874b6a78c7d87bc826581b0695cd338e2b) or upgrade to a version including these fixes. No additional mitigation actions are required.
Description
A vulnerability in the Linux kernel arm64 RSI code caused a field-spanning write warning during attestation token initialization. This was due to incorrect handling of register arguments leading to a memcpy operation that overwrote more memory than intended. The issue has been fixed by adjusting the data structure to correctly represent the 64-byte challenge array, preventing the unsafe write.