{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43304", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:56.000Z", "datePublished": "2026-05-08T13:11:24.264Z", "dateUpdated": "2026-05-09T04:10:17.378Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-09T04:10:17.378Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: define and enforce CEPH_MAX_KEY_LEN\n\nWhen decoding the key, verify that the key material would fit into\na fixed-size buffer in process_auth_done() and generally has a sane\nlength.\n\nThe new CEPH_MAX_KEY_LEN check replaces the existing check for a key\nwith no key material which is a) not universal since CEPH_CRYPTO_NONE\nhas to be excluded and b) doesn't provide much value since a smaller\nthan needed key is just as invalid as no key -- this has to be handled\nelsewhere anyway."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ceph/crypto.c", "net/ceph/crypto.h", "net/ceph/messenger_v2.c"], "versions": [{"version": "cd1a677cad994021b19665ed476aea63f5d54f31", "lessThan": "6405e8c680974bb74e2c98d5249fb52c7b12a6c6", "status": "affected", "versionType": "git"}, {"version": "cd1a677cad994021b19665ed476aea63f5d54f31", "lessThan": "8d745d38c88ecbed95f6b2b39857bf89f35a3244", "status": "affected", "versionType": "git"}, {"version": "cd1a677cad994021b19665ed476aea63f5d54f31", "lessThan": "e1dc45d97975f9db65694d234fbddf1915176e16", "status": "affected", "versionType": "git"}, {"version": "cd1a677cad994021b19665ed476aea63f5d54f31", "lessThan": "1b275bd49e58752efb83767a5d1aed41356c5e64", "status": "affected", "versionType": "git"}, 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"https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64"}, {"url": "https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed"}, {"url": "https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb"}, {"url": "https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf"}], "title": "libceph: define and enforce CEPH_MAX_KEY_LEN", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: define and enforce CEPH_MAX_KEY_LEN\n\nWhen decoding the key, verify that the key material would fit into\na fixed-size buffer in process_auth_done() and generally has a sane\nlength.\n\nThe new CEPH_MAX_KEY_LEN check replaces the existing check for a key\nwith no key material which is a) not universal since CEPH_CRYPTO_NONE\nhas to be excluded and b) doesn't provide much value since a smaller\nthan needed key is just as invalid as no key -- this has to be handled\nelsewhere anyway."}], "id": "CVE-2026-43304", "lastModified": "2026-05-08T14:16:37.693", "metrics": {}, "published": "2026-05-08T14:16:37.693", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1b275bd49e58752efb83767a5d1aed41356c5e64"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6405e8c680974bb74e2c98d5249fb52c7b12a6c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8d745d38c88ecbed95f6b2b39857bf89f35a3244"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ac431d597a9bdfc2ba6b314813f29a6ef2b4a3bf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c1a0f5f1e5e7e98c36a362ec3d1fcfd9932931ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d82467c07b03a27c3c5469b62bb3b726305a80bb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e1dc45d97975f9db65694d234fbddf1915176e16"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: libceph: define and enforce CEPH_MAX_KEY_LEN", "id": "2468062", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468062"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-1284", "details": ["A flaw was found in the `libceph` component of the Linux kernel. This vulnerability occurs when the kernel processes authentication keys, specifically in the `process_auth_done()` function, where it fails to properly enforce a maximum length for key material. An attacker could exploit this by providing an overly long key, potentially leading to a buffer overflow. This could result in a denial of service (DoS) or other unpredictable system behavior."], "name": "CVE-2026-43304", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43304\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43304\nhttps://lore.kernel.org/linux-cve-announce/2026050857-CVE-2026-43304-a225@gregkh/T"], "threat_severity": "Important"}