CVE-2026-97590

Sensitive data exposure via unscrubbed PAES buffers

Published Sep 25, 2026 · Updated Sep 25, 2026

Information disclosure in Linux 6.16 and later allows attackers to expose residual PAES data via unspecified vectors. ctr_paes_do_crypt leaves a partial-block buffer uncleared, while __xts_2keys_prep_param clears only its key field instead of the full parameter block. Exposure requires an s390 system to use protected-key AES, and no direct method for retrieving the residual kernel-stack data is published.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Linux 6.16 and later allows attackers to expose residual PAES data via unspecified vectors. ctr_paes_do_crypt leaves a partial-block buffer uncleared, while __xts_2keys_prep_param clears only its key field instead of the full parameter block. Exposure requires an s390 system to use protected-key AES, and no direct method for retrieving the residual kernel-stack data is published.

The record

CVE
CVE-2026-97590
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 25, 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=6.16
  2. Affected versionversion=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <19a218b46b2471d370c11fb52040f36ac8d05d23
  3. Affected versionversion=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <7d1456d54b3c784cc2917c219a528092cefe30cd
  4. Affected versionversion=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <d7159d2132e9aa51af7acb51c6742d9b30f987b3

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <19a218b46b2471d370c11fb52040f36ac8d05d23; version=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <7d1456d54b3c784cc2917c219a528092cefe30cd; version=6cd87cb5ef6ca50ae17c371482ceaab1d635e232 <d7159d2132e9aa51af7acb51c6742d9b30f987b3

Published CVSS scores

No CVSS assessment is available in this record.

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

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

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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