CVE-2026-93161Hinoki check available

Key disclosure via uncleared AES key schedule

Published Sep 17, 2026 · Updated Sep 17, 2026

Key retention in the Linux 5.11 QAT driver allows local users to access AES key material via uncleared kernel stack memory. The qat_alg_xts_reverse_key() function expands the forward XTS AES key into a temporary crypto_aes_ctx and leaves that context uncleared after copying the schedule. Disclosure requires access to residual kernel stack contents; the published notice does not identify a way to obtain that access.

CVSS severity2.5
Low
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Key retention in the Linux 5.11 QAT driver allows local users to access AES key material via uncleared kernel stack memory. The qat_alg_xts_reverse_key() function expands the forward XTS AES key into a temporary crypto_aes_ctx and leaves that context uncleared after copying the schedule. Disclosure requires access to residual kernel stack contents; the published notice does not identify a way to obtain that access.

The record

CVE
CVE-2026-93161
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-212
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <892f34dc1819cceb8841005a68086710ce3763b6
  2. Affected versionversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <92e4979e1a770860b26aa3d90cce0c4c6a53833c
  3. Affected versionversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <9af019e213ada5c3d0d33c515071a1414b6899f3
  4. Affected versionversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <b9cf42622b30178f554fa74411eec67e02d70411
  5. Affected versionversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <d41a9fcfb7f9ee36e4a4aaf5e7996bca6be1e7a9
  6. Affected versionversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <dcaa0f1e86cbcb01f68131ae907b54cf299a3592
  7. Affected versionversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <fb1194b78a163cc56bb9480c707fc34b53522359
  8. Affected versionversion=5.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <892f34dc1819cceb8841005a68086710ce3763b6; version=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <92e4979e1a770860b26aa3d90cce0c4c6a53833c; version=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <9af019e213ada5c3d0d33c515071a1414b6899f3; version=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <b9cf42622b30178f554fa74411eec67e02d70411; version=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <d41a9fcfb7f9ee36e4a4aaf5e7996bca6be1e7a9; version=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <dcaa0f1e86cbcb01f68131ae907b54cf299a3592; version=5106dfeaeabea73d5132daab1d89d57b57fa98b7 <fb1194b78a163cc56bb9480c707fc34b53522359; version=5.11

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-212Improper Removal of Sensitive Information Before Storage or Transfer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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