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CVE-2026-46085 (GCVE-0-2026-46085)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:58 – Updated: 2026-08-05 12:29
VLAI
Title
rxrpc: Fix rxkad crypto unalignment handling
Summary
In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix rxkad crypto unalignment handling Fix handling of a packet with a misaligned crypto length. Also handle non-ENOMEM errors from decryption by aborting. Further, remove the WARN_ON_ONCE() so that it can't be remotely triggered (a trace line can still be emitted).
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9853917f9edf08efb0b55c26d9eb8340f126d9e9 , < f1c6bd0cc786a8fa74829ce3c4b3673944a308f4 (git)
Affected: e9c369d58785044427450350ad32d6a2497fb379 , < 440d20d95e844b657a93a0b2dcc2aae155efdce6 (git)
Affected: bf4d6e4a6856eedeb7f66eb91224115bfff4e2cb , < f0d3efd03b2a9e0f1ffa6df8fcb264af3d494286 (git)
Affected: f93af41b9f5f798823d0d0fb8765c2a936d76270 , < af9271eb666d07b6f65612dc160a47f7cb5220ed (git)
Affected: f93af41b9f5f798823d0d0fb8765c2a936d76270 , < def304aae2edf321d2671fd6ca766a93c21f877e (git)
Affected: 5cdf57eda01a1ffaeb61ac39ec4dcc94a690431e (git)
Affected: 6.6.135 , < 6.6.140 (semver)
Affected: 6.12.82 , < 6.12.86 (semver)
Affected: 6.18.23 , < 6.18.27 (semver)
Affected: 6.19.13 , < 6.20 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

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              "value": "AV:N - rxrpc is the UDP-based AFS RPC protocol; the vulnerable code processes DATA packets received from a remote network peer, and AFS cells routinely traverse the internet.\nAC:L - The attacker fully controls the DATA payload length (UDP datagram size minus headers) and can reliably set it to a non-multiple of 8; the rxkad checksum does not cover the data length, so the misaligned packet reliably reaches the crypto path.\nPR:N - An on-path attacker modifying an in-flight packet, or a malicious server the victim client connects to, needs no credentials or privileges on the target system since the 16-bit checksum gate is independent of the data length.\nUI:N - Received DATA packets are decrypted/verified automatically during normal call processing; tampering with packets of an existing connection requires no victim action.\nS:U - The triggered WARN/panic is contained within the kernel\u0027s own security authority and crosses no privilege or virtualization boundary.\nC:N - The bug only causes a crypto error path to WARN; no kernel memory is read or disclosed to the remote attacker.\nI:N - No memory is corrupted or modified\u2014the misaligned length is rejected by the cipher, so there is no write primitive or data tampering.\nA:H - The remotely-triggerable WARN_ON_ONCE causes a kernel panic on the common panic_on_warn configuration, yielding a full denial of service."
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    "dateReserved": "2026-05-13T15:03:33.096Z",
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    "state": "PUBLISHED"
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      "date": "2026-09-16",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "rxrpc: Fix rxkad crypto unalignment handling",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46085.json",
      "version": "3"
    },
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Further, remove the\\nWARN_ON_ONCE() so that it can\u0027t be remotely triggered (a trace line can\\nstill be 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    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T11:05:49+00:00",
      "cve": "CVE-2026-46085",
      "id": "CVE-2026-46085",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: rxrpc: Fix rxkad crypto unalignment handling",
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      "version": "3"
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      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-06T01:18:13Z",
      "cve": "CVE-2026-46085",
      "id": "CVE-2026-46085",
      "initial_release_date": "2026-05-28T03:52:56Z",
      "product_status:known_not_affected": "293",
      "product_status:recommended": "4",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46085",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46085.json",
      "version": "5"
    }
  }
}



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