CVE-2026-74566

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This\nonly changes the in-memory ordering used to place keys within a keyring;\nadd, search and read of non-colliding keys are unaffected."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["security/keys/keyring.c"], "versions": [{"version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "lessThan": "414bcf37d81ce9b3823aabc06b04c97fdcbe489b", "status": "affected", "versionType": "git"}, {"version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "lessThan": "abe43c661efb753d5ee35ad8ace4bbb16fa9afd0", "status": "affected", "versionType": "git"}, {"version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "lessThan": "f81920917074e3c4ad4fba06fe8c56738d010606", "status": "affected", "versionType": "git"}, {"version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "lessThan": "bd0f976ef89dce6db458bf75bc2cf51127becc41", "status": "affected", "versionType": "git"}, {"version": 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["security/keys/keyring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "414bcf37d81ce9b3823aabc06b04c97fdcbe489b", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}, {"lessThan": "abe43c661efb753d5ee35ad8ace4bbb16fa9afd0", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}, {"lessThan": "f81920917074e3c4ad4fba06fe8c56738d010606", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}, {"lessThan": "bd0f976ef89dce6db458bf75bc2cf51127becc41", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}, {"lessThan": "7269df3e7fcfa308e6a456305162f7788747bdbd", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}, {"lessThan": "3d9f16c0b643ceac305526b2e2fe25c2c6166926", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}, {"lessThan": "7e5397a3fed0dee7779bd084bec3c0584db3c930", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}, {"lessThan": "58565eef0f8d861aae92abfb7658458d661cee17", "status": "affected", "version": "f771fde82051976a6fc0fd570f8b86de4a92124b", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["security/keys/keyring.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.3"}, {"lessThan": "5.3", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.265", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.216", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.183", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.151", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.103", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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."}], "id": "CVE-2026-74566", "lastModified": "2026-11-06T17:19:50.980", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74566", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:59:38.524591Z", "version": "2.0.3"}}]}, "published": "2026-08-15T13:18:02.120", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d9f16c0b643ceac305526b2e2fe25c2c6166926"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/414bcf37d81ce9b3823aabc06b04c97fdcbe489b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/58565eef0f8d861aae92abfb7658458d661cee17"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7269df3e7fcfa308e6a456305162f7788747bdbd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7e5397a3fed0dee7779bd084bec3c0584db3c930"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/abe43c661efb753d5ee35ad8ace4bbb16fa9afd0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bd0f976ef89dce6db458bf75bc2cf51127becc41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f81920917074e3c4ad4fba06fe8c56738d010606"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: keys: make keyring key-chunk byte order agree with keyring_diff_objects()", "id": "2517024", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2517024"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-1025", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nkeys: make keyring key-chunk byte order agree with keyring_diff_objects()\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.\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.", "A flaw was found in the Linux kernel's `keys` subsystem. An inconsistency in how key descriptions are processed by the `keyring_get_key_chunk()` and `keyring_diff_objects()` functions could allow a local attacker to create specially crafted key descriptions. These crafted descriptions might collide, potentially leading to unexpected system behavior or a denial of service."], "name": "CVE-2026-74566", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74566\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74566\nhttps://lore.kernel.org/linux-cve-announce/2026081553-CVE-2026-74566-8e78@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f771fde82051976a6fc0fd570f8b86de4a92124b,bd0f976ef89dce6db458bf75bc2cf51127becc41)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f771fde82051976a6fc0fd570f8b86de4a92124b,7269df3e7fcfa308e6a456305162f7788747bdbd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f771fde82051976a6fc0fd570f8b86de4a92124b,3d9f16c0b643ceac305526b2e2fe25c2c6166926)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f771fde82051976a6fc0fd570f8b86de4a92124b,7e5397a3fed0dee7779bd084bec3c0584db3c930)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f771fde82051976a6fc0fd570f8b86de4a92124b,58565eef0f8d861aae92abfb7658458d661cee17)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.151,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.103,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T15:00:04.340232+00:00", "updated": "2026-08-21T23:15:05.350387+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}