s390/dasd: Propagate partial completion length across ERP recovery
In the Linux kernel, the following vulnerability has been resolved: s390/dasd: Propagate partial completion length across ERP recovery dasd_default_erp_postaction() copies the timing and device state from the finished ERP request back to the original request but drops proc_bytes. A request that was partially completed, an ESE read of a not-yet-allocated track returns fewer bytes than requested, and then recovered through the ERP chain loses its partial-completion length. __dasd_cleanup_cqr() then sees proc_bytes == 0 and completes the whole request instead of requeueing the remainder, silently returning zeroed data for the part that was never read. Carry proc_bytes over to the original request like the other per-request state.
CVE-2026-89456
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-2026-89456
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": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "9e063165d3fe58db2a517717b830f17e82d03467",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "6b0954c8a259da1e4aa745989f82723947acfb46",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "f735b9710f0c8fe72c1060103e865f4ae678190b",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "d6b8778b1b82aa3a8dbf8612080f635b834bd16b",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "ceafb262475ac6cb3a7d07b1102608be2b216b99",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "15ec03452c18e8d288e519837d21b308300d74b2",
"versionType": "git"
},
{
"status": "affected",
"version": "5e6bdd37c5526ef01326df5dabb93011ee89237e",
"lessThan": "6fb5ba2e7e43173a3761e46f091070a8185efa14",
"versionType": "git"
},
{
"status": "affected",
"version": "fbbacd0dcbc3ae9398c569dbea96ae4b5ad97e04",
"versionType": "git"
},
{
"status": "affected",
"version": "5f7c9989f11305aaa43e0f4378f4f070022a9f2b",
"versionType": "git"
},
{
"status": "affected",
"version": "5.4.26",
"lessThan": "5.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.5.10",
"lessThan": "5.6",
"versionType": "semver"
}
],
"programFiles": [
"drivers/s390/block/dasd_erp.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.270",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/s390/block/dasd_erp.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89456
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34988 · Revision 1
- Added to Heist Feed
- Publisher date