CVE-2026-74566 (GCVE-0-2026-74566)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:28 – Updated: 2026-08-19 16:39
VLAI
Title
keys: make keyring key-chunk byte order agree with keyring_diff_objects()
Summary
In the Linux kernel, the following vulnerability has been resolved: keys: make keyring key-chunk byte order agree with keyring_diff_objects() keyring_get_key_chunk() loads description bytes into the index chunk low address first, while keyring_diff_objects() numbers the first differing bit from the low end and folds the absolute byte index into the level without removing the inline-prefix offset the level already carries. The two disagree on byte order and bit position, so the array can be told two keys first differ at a bit that does not differ in the chunk the walker uses, letting crafted descriptions collide into one node. Load the chunk in the order keyring_diff_objects() assumes and drop the inline-prefix length when folding the byte index into the level. This only changes the in-memory ordering used to place keys within a keyring; add, search and read of non-colliding keys are unaffected.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < 414bcf37d81ce9b3823aabc06b04c97fdcbe489b (git)
Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < abe43c661efb753d5ee35ad8ace4bbb16fa9afd0 (git)
Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < f81920917074e3c4ad4fba06fe8c56738d010606 (git)
Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < bd0f976ef89dce6db458bf75bc2cf51127becc41 (git)
Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < 7269df3e7fcfa308e6a456305162f7788747bdbd (git)
Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < 3d9f16c0b643ceac305526b2e2fe25c2c6166926 (git)
Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < 7e5397a3fed0dee7779bd084bec3c0584db3c930 (git)
Affected: f771fde82051976a6fc0fd570f8b86de4a92124b , < 58565eef0f8d861aae92abfb7658458d661cee17 (git)
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Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nkeys: make keyring key-chunk byte order agree with keyring_diff_objects()\n\nkeyring_get_key_chunk() loads description bytes into the index chunk low\naddress first, while keyring_diff_objects() numbers the first differing\nbit from the low end and folds the absolute byte index into the level\nwithout removing the inline-prefix offset the level already carries.\nThe two disagree on byte order and bit position, so the array can be\ntold two keys first differ at a bit that does not differ in the chunk\nthe walker uses, letting crafted descriptions collide into one node.\n\nLoad the chunk in the order keyring_diff_objects() assumes and drop the\ninline-prefix length when folding the byte index into the level.  This\nonly changes the in-memory ordering used to place keys within a keyring;\nadd, search and read of non-colliding keys are unaffected."
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    "dateReserved": "2026-08-15T05:44:03.917Z",
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      "current_release_date": "2026-08-21T08:08:26+00:00",
      "cve": "CVE-2026-74566",
      "id": "CVE-2026-74566",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: keys: make keyring key-chunk byte order agree with keyring_diff_objects()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74566.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-18T00:26:24Z",
      "cve": "CVE-2026-74566",
      "id": "CVE-2026-74566",
      "initial_release_date": "2026-08-15T23:50:02Z",
      "product_status:known_affected": "626",
      "product_status:known_not_affected": "93",
      "product_status:recommended": "107",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74566",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74566.json",
      "version": "10"
    }
  }
}



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