nvmet-auth: zero the AUTH_RECEIVE response buffer
In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: zero the AUTH_RECEIVE response buffer nvmet_execute_auth_receive() allocates the response buffer with kmalloc() sized by the host-supplied AUTH_RECEIVE allocation length, but the DH-HMAC-CHAP builders write only a fixed-size message into it. The full allocation length is then copied to the wire by nvmet_copy_to_sgl(), so a remote initiator receives the bytes past the built message -- up to nearly a page of uninitialized slab -- during the pre-authentication handshake. Allocate the buffer with kzalloc() so the unwritten tail is zeroed before it is sent; conforming responses are unaffected.
- Products
- Kernel
- Affected versions
- Not specified
- Fixed versions
- 6.1.185, 6.12.106, 6.18.47, 6.6.154, 7.1.11, 7.2.1
- CVEs
- CVE-2026-80791
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 2 Nov 2026, 17:32 UTC · Revision 1
Source evidence
nvmet-auth: zero the AUTH_RECEIVE response buffer
core-osv · Original sourcePublished 4 Sept 2026, 15:13 UTC
In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: zero the AUTH_RECEIVE response buffer nvmet_execute_auth_receive() allocates the response buffer with kmalloc() sized by the host-supplied AUTH_RECEIVE allocation length, but the DH-HMAC-CHAP builders write only a fixed-size message into it. The full allocation length is then copied to the wire by nvmet_copy_to_sgl(), so a remote initiator receives the bytes past the built message -- up to nearly a page of uninitialized slab -- during the pre-authentication handshake. Allocate the buffer with kzalloc() so the unwritten tail is zeroed before it is sent; conforming responses are unaffected.
osv:CVE-2026-80791
Kernel
Fixed versions: 6.1.185, 6.6.154, 6.12.106, 6.18.47, 7.1.11, 7.2.1
Complete source record
{
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"title": "nvmet-auth: zero the AUTH_RECEIVE response buffer",
"summary": "In the Linux kernel, the following vulnerability has been resolved: nvmet-auth: zero the AUTH_RECEIVE response buffer nvmet_execute_auth_receive() allocates the response buffer with kmalloc() sized by the host-supplied AUTH_RECEIVE allocation length, but the DH-HMAC-CHAP builders write only a fixed-size message into it. The full allocation length is then copied to the wire by nvmet_copy_to_sgl(), so a remote initiator receives the bytes past the built message -- up to nearly a page of uninitialized slab -- during the pre-authentication handshake. Allocate the buffer with kzalloc() so the unwritten tail is zeroed before it is sent; conforming responses are unaffected.",
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"modified": "2026-10-28T02:30:21.582762055Z",
"provider": "osv",
"references": [
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"https://nvd.nist.gov/vuln/detail/CVE-2026-80791",
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"security_relevant": true,
"severity_evidence": null
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"source_id": "core-osv",
"document_id": 487833,
"published_at": "2026-09-04T15:13:03.204+00:00"
}