CVE-2026-80708
In 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.
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
Description
In 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.
- CVSS
- Not yet scored
- EPSS
- 0.16% probability · 6th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/01476391aecef36a3b789ee844357b22fbc90665
- https://git.kernel.org/stable/c/4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3
- https://git.kernel.org/stable/c/7dd6e556dbfc91d3d511cfd1015d2dad42608010
- https://git.kernel.org/stable/c/8e1c0def77b7450be0ed607ed0d7bae629d30020
- https://git.kernel.org/stable/c/b453003ae6a869f5bdf025b5519cbb38295ae4f1
- https://git.kernel.org/stable/c/be7ae07fb745d1cf575b03a178a055b0a2859364
- https://git.kernel.org/stable/c/ebfbb9ac7adbb1e3556100b54a27e8a9b102feac
- https://git.kernel.org/stable/c/fbb0410986e8ad214121e51a4a28c3d0a10b7644
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.