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keys: make keyring key-chunk byte order agree with keyring_diff_objects()

Type: advisorySource: OSV1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-74566

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: osv:CVE-2026-74566

Kernel

Source reference: /affected/1/package/name

Affected versions
Not stated in this record
Fixed versions
5.10.265

Source reference: /affected/1/ranges

5.15.216

Source reference: /affected/1/ranges

6.1.183

Source reference: /affected/1/ranges

6.6.151

Source reference: /affected/1/ranges

6.12.103

Source reference: /affected/1/ranges

6.18.44

Source reference: /affected/1/ranges

7.1.8

Source reference: /affected/1/ranges

Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "ranges": [
      {
        "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
        "type": "GIT",
        "events": [
          {
            "introduced": "f771fde82051976a6fc0fd570f8b86de4a92124b"
          },
          {
            "fixed": "414bcf37d81ce9b3823aabc06b04c97fdcbe489b"
          },
          {
            "fixed": "abe43c661efb753d5ee35ad8ace4bbb16fa9afd0"
          },
          {
            "fixed": "f81920917074e3c4ad4fba06fe8c56738d010606"
          },
          {
            "fixed": "bd0f976ef89dce6db458bf75bc2cf51127becc41"
          },
          {
            "fixed": "7269df3e7fcfa308e6a456305162f7788747bdbd"
          },
          {
            "fixed": "3d9f16c0b643ceac305526b2e2fe25c2c6166926"
          },
          {
            "fixed": "7e5397a3fed0dee7779bd084bec3c0584db3c930"
          },
          {
            "fixed": "58565eef0f8d861aae92abfb7658458d661cee17"
          }
        ]
      }
    ],
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74566.json"
    }
  },
  {
    "ranges": [
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "5.3.0"
          },
          {
            "fixed": "5.10.265"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "5.11.0"
          },
          {
            "fixed": "5.15.216"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "5.16.0"
          },
          {
            "fixed": "6.1.183"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.2.0"
          },
          {
            "fixed": "6.6.151"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.7.0"
          },
          {
            "fixed": "6.12.103"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.13.0"
          },
          {
            "fixed": "6.18.44"
          }
        ]
      },
      {
        "type": "ECOSYSTEM",
        "events": [
          {
            "introduced": "6.19.0"
          },
          {
            "fixed": "7.1.8"
          }
        ]
      }
    ],
    "package": {
      "name": "Kernel",
      "ecosystem": "Linux"
    },
    "database_specific": {
      "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74566.json"
    }
  }
]
Related CVEs
CVE-2026-74566

Source reference: /id

Publisher severity

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Event
#50689 · Revision 1
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Publisher date
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