GHSA-54RX-HJQG-C852
Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-14 15:32In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89456"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-11T20:19:26Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/dasd: Propagate partial completion length across ERP recovery\n\ndasd_default_erp_postaction() copies the timing and device state from\nthe finished ERP request back to the original request but drops\nproc_bytes. A request that was partially completed, an ESE read of a\nnot-yet-allocated track returns fewer bytes than requested, and then\nrecovered through the ERP chain loses its partial-completion length.\n__dasd_cleanup_cqr() then sees proc_bytes == 0 and completes the whole\nrequest instead of requeueing the remainder, silently returning zeroed\ndata for the part that was never read.\n\nCarry proc_bytes over to the original request like the other\nper-request state.",
"id": "GHSA-54rx-hjqg-c852",
"modified": "2026-09-14T15:32:24Z",
"published": "2026-09-11T21:31:26Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89456"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/15ec03452c18e8d288e519837d21b308300d74b2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6b0954c8a259da1e4aa745989f82723947acfb46"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6fb5ba2e7e43173a3761e46f091070a8185efa14"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9e063165d3fe58db2a517717b830f17e82d03467"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ceafb262475ac6cb3a7d07b1102608be2b216b99"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d0a2f97d8c97134aa7f6a191940b7bab4bb42f5f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d6b8778b1b82aa3a8dbf8612080f635b834bd16b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f735b9710f0c8fe72c1060103e865f4ae678190b"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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