Residual cryptographic data exposure via uncleared buffers
Published Sep 25, 2026 · Updated Sep 25, 2026
Information disclosure in affected Linux kernel versions through 6.8 allows attackers to expose residual data through s390 AES operations. ctr_aes_crypt() leaves its partial-block stack buffer uncleared, while gcm_aes_crypt() can exit without clearing the CPACF parameter block and gcm_sg_walk buffers. The flaw is limited to the s390 AES implementation; public records do not specify an exploit path or whether disclosure reaches an unprivileged caller.
Summary
What happened
Information disclosure in affected Linux kernel versions through 6.8 allows attackers to expose residual data through s390 AES operations. ctr_aes_crypt() leaves its partial-block stack buffer uncleared, while gcm_aes_crypt() can exit without clearing the CPACF parameter block and gcm_sg_walk buffers. The flaw is limited to the s390 AES implementation; public records do not specify an exploit path or whether disclosure reaches an unprivileged caller.
The record
- CVE
- CVE-2026-97592
- 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
- Sep 25, 2026CVE publishedPublication date reported by the CVE source.
- 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.
- Affected versionversion=5.10.210 <5.11
- Affected versionversion=5.15.149 <5.16
- Affected versionversion=6.1.76 <6.2
- Affected versionversion=6.6.15 <6.7
- Affected versionversion=6.7.3 <6.8
- Affected versionversion=6.8
- Affected versionversion=a7f580cdb42ec3d53bbb7c4e4335a98423703285
- Affected versionversion=cd51e26a3b89706beec64f2d8296cfb1c34e0c79
- Affected versionversion=d07f951903fa9922c375b8ab1ce81b18a0034e3b <11eca05d2062032e1f07d56be58ed0b99f4b1d63
- Affected versionversion=d07f951903fa9922c375b8ab1ce81b18a0034e3b <8b7c3b6914f19caf648d05726a86af6326d3c2c6
- Affected versionversion=d07f951903fa9922c375b8ab1ce81b18a0034e3b <8b90a47c4fba27bb4f2f086611742493629e9696
- Affected versionversion=d07f951903fa9922c375b8ab1ce81b18a0034e3b <a83488cecb35f924b7541306ed84893bb9906196
- Affected versionversion=d68ac38895e84446848b7647ab9458d54cacba3e
- Affected versionversion=dbc9a791a70ea47be9f2acf251700fe254a2ab23
- Affected versionversion=e78f1a43e72daf77705ad5b9946de66fc708b874
What conditions does exploitation require?
What is affected?
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.
Weakness, pattern, technique
No sourced classifications are available.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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