s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-80708
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-28 08:16:56 UTC
Updated2026-08-28 08:16:56 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey() The helper function _ip_cprb_helper() uses internal buffer memory for building and processing CPRBs. After use this buffer was never scrubbed which could lead to leaving for example clear key material in memory which could be exposed via tricky reuse of this same memory. Extend the _ip_cprb_helper() function with another parameter 'scrub' used to steer scrubbing of this buffer. So now the caller has the opportunity to decide if scrubbing is needed or not. Extend the clear key to secure key token import process in function cca_clr2cipherkey() to tell the helper function from above to scrub the cprb buffer when the clear key value is part of the request data. Add explicit scrubbing on return from function cca_clr2cipherkey() for the random EXOR buffer and the cprb buffer. Overall this cleans the internal used buffer in case of clear key import to prevent sensitive data to get exposed.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 8e1c0def77b7450be0ed607ed0d7bae629d30020 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd be7ae07fb745d1cf575b03a178a055b0a2859364 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 7dd6e556dbfc91d3d511cfd1015d2dad42608010 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd b453003ae6a869f5bdf025b5519cbb38295ae4f1 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd fbb0410986e8ad214121e51a4a28c3d0a10b7644 git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd ebfbb9ac7adbb1e3556100b54a27e8a9b102feac git Not specified
CNA Linux Linux affected 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd 01476391aecef36a3b789ee844357b22fbc90665 git Not specified
CNA Linux Linux affected 5.4 Not specified
CNA Linux Linux unaffected 5.4 semver Not specified
CNA Linux Linux unaffected 5.10.265 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.216 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.183 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.152 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.104 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.44 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.8 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b453003ae6a869f5bdf025b5519cbb38295ae4f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/be7ae07fb745d1cf575b03a178a055b0a2859364 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7dd6e556dbfc91d3d511cfd1015d2dad42608010 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ebfbb9ac7adbb1e3556100b54a27e8a9b102feac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/fbb0410986e8ad214121e51a4a28c3d0a10b7644 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/01476391aecef36a3b789ee844357b22fbc90665 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8e1c0def77b7450be0ed607ed0d7bae629d30020 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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