CVE-2026-97592: Linux kernel · s390/crypto: Fix missing scrub of temp buffers with AES ctr and gcm algorithm
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 13:47 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 25 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
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been implemented in the Linux kernel to explicitly scrub temporary buffers and parameter blocks in the affected AES CTR and GCM functions. Users should update to patched versions of the linux-hwe-edge kernel listed as affected to mitigate this vulnerability.
Description
A vulnerability in the Linux kernel's s390 crypto implementation was fixed to address missing scrubbing of temporary buffers used in AES CTR and GCM algorithms. The flaw involved buffers processing remaining bytes less than AES block size and error paths where sensitive data in parameter blocks and buffers were not properly cleared, potentially exposing unwanted data. The issue affects specific versions of the linux-hwe-edge kernel.
References
- ubuntu.com/security/CVE-2026-97592 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-97592 (opens in a new tab)
- git.kernel.org/stable/c/8b90a47c4fba27bb4f2f086611742493629e9696 (opens in a new tab)
- git.kernel.org/stable/c/11eca05d2062032e1f07d56be58ed0b99f4b1d63 (opens in a new tab)
- git.kernel.org/stable/c/a83488cecb35f924b7541306ed84893bb9906196 (opens in a new tab)
- git.kernel.org/stable/c/8b7c3b6914f19caf648d05726a86af6326d3c2c6 (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-97592 (opens in a new tab)
- git.kernel.org/stable/c/538f00558db9a66aeff20c36f43692c178a0e0eb (opens in a new tab)
- git.kernel.org/stable/c/6ab772d675a885c3119bf0e79ea9e84756d7657a (opens in a new tab)
- git.kernel.org/stable/c/991c875310254a13b3a637bb279379c8c66e842d (opens in a new tab)
- git.kernel.org/stable/c/e17b85eb8cee90a1200fa5e7806db7ffa08a0608 (opens in a new tab)