Unknown

CVE-2026-80708 — s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey()

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.

Published Aug 28, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.22%

ahead of 12% of scored CVEs · Oct 26, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < 8e1c0def77b7450be0ed607ed0d7bae629d30020≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < be7ae07fb745d1cf575b03a178a055b0a2859364≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < 4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < 7dd6e556dbfc91d3d511cfd1015d2dad42608010≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < b453003ae6a869f5bdf025b5519cbb38295ae4f1≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < fbb0410986e8ad214121e51a4a28c3d0a10b7644≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < ebfbb9ac7adbb1e3556100b54a27e8a9b102feac≥ 4bc123b18ce6ae6c42c69d0456b5acbd2f7bc8bd and < 01476391aecef36a3b789ee844357b22fbc90665 and 1 more version 5.4	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 26, 2026 · 11 reading(s) · max 0.22%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 15, 2026
Affected products added · linux/linux
Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 15, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 15, 2026 · NIST National Vulnerability Database
CVE published
Aug 28, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

8 on the record

git.kernel.org/stable/c/8e1c0def77b7450be0ed607ed0d7bae629d30020
NIST National Vulnerability Database
git.kernel.org/stable/c/b453003ae6a869f5bdf025b5519cbb38295ae4f1
NIST National Vulnerability Database
git.kernel.org/stable/c/ebfbb9ac7adbb1e3556100b54a27e8a9b102feac
NIST National Vulnerability Database
git.kernel.org/stable/c/4e26d0d72bfdec311f12acfa0c6b7fbeb6a343d3
NIST National Vulnerability Database
git.kernel.org/stable/c/be7ae07fb745d1cf575b03a178a055b0a2859364
NIST National Vulnerability Database
git.kernel.org/stable/c/fbb0410986e8ad214121e51a4a28c3d0a10b7644
NIST National Vulnerability Database
git.kernel.org/stable/c/01476391aecef36a3b789ee844357b22fbc90665
NIST National Vulnerability Database
git.kernel.org/stable/c/7dd6e556dbfc91d3d511cfd1015d2dad42608010
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Unknown CVE-2026-99092 riscv: patch: fix handling of bpf-jit execmem addresses 23h
Unknown CVE-2026-99093 mm: don't schedule deferred kernel page table freeing while booting 23h
Unknown CVE-2026-99095 drm/vc4: drain the hangcheck timer and works on V3D unbind 23h
Unknown CVE-2026-99096 io_uring/register: don't exempt disabled rings from task restrictions 23h
Unknown CVE-2026-99097 tee: shm: reject zero-sized allocations in tee_dyn_shm_alloc_helper() 23h
Unknown CVE-2026-99098 dm-integrity: fix buffer overflow in inline mode with large tag size 23h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-80708 is "s390/zcrypt: Fix missing mem scrub at clear key import in cca_clr2cipherkey()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.22% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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