s390/zcrypt: Pad trailing CCA or EP11 message with zeros
In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Pad trailing CCA or EP11 message with zeros The both functions xcrb_msg_to_type6cprb_msgx() and xcrb_msg_to_type6_ep11cprb_msgx() copy the user space message into a kernel buffer based on the message length. But on further processing the message is supposed to be 4 byte length adjusted. Thus up to 3 bytes of uninitialized kernel memory are forwarded to further processing steps and may unwanted expose kernel memory to the crypto card firmware. This patch contains code to pad the gap between user space copied message and message buffer length sent down to further processing of the CCA or EP11 message to zeros.
CVE-2026-80543
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80543
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "20b0b0159390fa5c00a435195649680fefda81e0",
"lessThan": "44e61f1834831f873af5a4fec5a5e432b929c6a2",
"versionType": "git"
},
{
"status": "affected",
"version": "e2c6d91eb8b1533753755f07803e47eceed263d0",
"lessThan": "2db92a56b000173d332b6c30f38a5a4444e4355a",
"versionType": "git"
},
{
"status": "affected",
"version": "e2c6d91eb8b1533753755f07803e47eceed263d0",
"lessThan": "eb363254472493e3458156fc11fd56dca92f4333",
"versionType": "git"
},
{
"status": "affected",
"version": "f9da85d4780515f65983e0af151458599adaef3d",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.114",
"lessThan": "6.13",
"versionType": "semver"
}
],
"programFiles": [
"drivers/s390/crypto/zcrypt_msgtype6.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.1.10",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/s390/crypto/zcrypt_msgtype6.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80543
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #46602 · Revision 1
- Added to Heist Feed
- Publisher date