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CVE-2026-80791 (GCVE-0-2026-80791)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:13 – Updated: 2026-09-04 15:13
VLAI
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 447b668faa14710f611e714031e3739ac3ec3a4f (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 8f6363c8d54dde95982f0ab45e77cf57ec0efd62 (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < dfcf013f77709ebdb282767edc2795a37cab5b57 (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < b26189d28442183a8b5edb754f4a6918f77ca84e (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 2dcc9226203da7275a9c29d20007da278d73d5e9 (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 1d6837d98bf966a041af65de5f78de7409ff83bc (git)
Affected: db1312dd95488b5e6ff362ff66fcf953a46b1821 , < 3ddcfb013322aa37eaa7a0d344b73079c38dfa21 (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.185 , ≤ 6.1.* (semver)
Unaffected: 6.6.154 , ≤ 6.6.* (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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      "cve": "CVE-2026-80791",
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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