CriticalFix available
crypto: pcrypt - Fix handling of MAY_BACKLOG requests
Type: advisorySources: OSV
In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 5.10.258, 5.15.209, 6.1.175, 6.12.86, 6.18.27, 6.6.140, 7.0.4
- CVEs
- CVE-2026-43493
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 20:12 UTC · Revision 1
Source evidence
crypto: pcrypt - Fix handling of MAY_BACKLOG requests
core-osv · Original sourcePublished 19 May 2026, 10:44 UTC
In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.
osv:CVE-2026-43493
Kernel
Fixed versions: 5.10.258, 5.15.209, 6.1.175, 6.6.140, 6.12.86, 6.18.27, 7.0.4
Complete source record
{
"id": "207a2eed419a3c1162a6c32dc70117ab0b4d2a2227da5bada28426ca2f104f16",
"url": "https://osv.dev/vulnerability/CVE-2026-43493",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "crypto: pcrypt - Fix handling of MAY_BACKLOG requests",
"summary": "In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.",
"evidence": "osv:CVE-2026-43493",
"products": [
{
"name": {
"value": "Kernel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "5.10.258",
"evidence": "/affected/1/ranges"
},
{
"value": "5.15.209",
"evidence": "/affected/1/ranges"
},
{
"value": "6.1.175",
"evidence": "/affected/1/ranges"
},
{
"value": "6.6.140",
"evidence": "/affected/1/ranges"
},
{
"value": "6.12.86",
"evidence": "/affected/1/ranges"
},
{
"value": "6.18.27",
"evidence": "/affected/1/ranges"
},
{
"value": "7.0.4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
}
],
"severity": "critical",
"structured": {
"id": "CVE-2026-43493",
"aliases": [
"CVE-2026-43493"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"type": "GIT",
"events": [
{
"introduced": "5a1436beec5744029f3ac90b6fe71a698dcd6155"
},
{
"fixed": "ae7e95638d956d556d74b9abb9e780d3bd3dcd9e"
},
{
"fixed": "1d7f07df450bac3301938fbc4251f2611be4084e"
},
{
"fixed": "76641449b28979ebd6c02e9598367e119e385236"
},
{
"fixed": "9f1cbca178c03188e201ed175251372149bb25f2"
},
{
"fixed": "eb34e243df57e32f4c08fa191f3602ea19076276"
},
{
"fixed": "77d55bc8675ee851ed639dc9be77325a8024cf67"
},
{
"fixed": "46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a"
},
{
"fixed": "915b692e6cb723aac658c25eb82c58fd81235110"
}
]
}
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43493.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "2.6.34"
},
{
"fixed": "5.10.258"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.11.0"
},
{
"fixed": "5.15.209"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "5.16.0"
},
{
"fixed": "6.1.175"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.2.0"
},
{
"fixed": "6.6.140"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.7.0"
},
{
"fixed": "6.12.86"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.13.0"
},
{
"fixed": "6.18.27"
}
]
},
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "6.19.0"
},
{
"fixed": "7.0.4"
}
]
}
],
"package": {
"name": "Kernel",
"ecosystem": "Linux"
},
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43493.json"
}
}
],
"modified": "2026-10-28T02:30:23.054423633Z",
"provider": "osv",
"references": [
"https://cert-portal.siemens.com/productcert/html/ssa-784472.html",
"https://git.kernel.org/stable/c/1d7f07df450bac3301938fbc4251f2611be4084e",
"https://git.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a",
"https://git.kernel.org/stable/c/76641449b28979ebd6c02e9598367e119e385236",
"https://git.kernel.org/stable/c/77d55bc8675ee851ed639dc9be77325a8024cf67",
"https://git.kernel.org/stable/c/915b692e6cb723aac658c25eb82c58fd81235110",
"https://git.kernel.org/stable/c/9f1cbca178c03188e201ed175251372149bb25f2",
"https://git.kernel.org/stable/c/ae7e95638d956d556d74b9abb9e780d3bd3dcd9e",
"https://git.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276",
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43493.json",
"https://nvd.nist.gov/vuln/detail/CVE-2026-43493",
"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
],
"provider_metadata": {
"cna_assigner": "Linux",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43493.json"
}
},
"related_cves": [
{
"value": "CVE-2026-43493",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 489680,
"published_at": "2026-05-19T10:44:25.402+00:00"
}