GHSA-X8R8-VHC5-QMVR
Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 15:31In the Linux kernel, the following vulnerability has been resolved:
s390/crypto: Fix wrong return code to engine in asynch callbacks
When crypto_finalize_hash_request() or crypto_finalize_skcipher_request() explicitly completes a request, the do_one_request callback must return 0 to indicate successful handling. Returning a negative error code causes the crypto engine to assume the driver failed to take ownership and triggers a second completion via crypto_request_complete(), resulting in a double completion. This pattern occurs in paes_s390.c 4 times and once in phmac_s390.c.
Fixed in phmac_do_one_request() and all four paes do_one_request callbacks (ecb, cbc, ctr, xts) by returning 0 after explicit finalization instead of propagating the error code.
{
"affected": [],
"aliases": [
"CVE-2026-97589"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-25T11:17:10Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ns390/crypto: Fix wrong return code to engine in asynch callbacks\n\nWhen crypto_finalize_hash_request() or\ncrypto_finalize_skcipher_request() explicitly completes a request, the\ndo_one_request callback must return 0 to indicate successful\nhandling. Returning a negative error code causes the crypto engine to\nassume the driver failed to take ownership and triggers a second\ncompletion via crypto_request_complete(), resulting in a double\ncompletion. This pattern occurs in paes_s390.c 4 times and once in\nphmac_s390.c.\n\nFixed in phmac_do_one_request() and all four paes do_one_request\ncallbacks (ecb, cbc, ctr, xts) by returning 0 after explicit\nfinalization instead of propagating the error code.",
"id": "GHSA-x8r8-vhc5-qmvr",
"modified": "2026-09-25T15:31:43Z",
"published": "2026-09-25T12:31:25Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97589"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5480291aa848e19e61175abfd457933516db70c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/972e0d9b7d1d112240ccde1f1be85bf9ffaa1720"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ac1481320110b803ab9b79ab4d2ca11a74fc05f2"
}
],
"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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