CVE-2026-8449

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{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Rejected reason: This CVE ID has been rejected or withdrawn."}], "id": "CVE-2026-8449", "lastModified": "2026-05-13T16:17:05.807", "metrics": {}, "published": "2026-05-12T22:16:38.730", "references": [], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Rejected"}

{"bugzilla": {"description": "kernel: ksmbd: Linux ksmbd: Privilege Escalation via crafted DACL in ACL inheritance", "id": "2476870", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2476870"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.8", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in Linux ksmbd. Remote clients with directory creation permissions can exploit a memory corruption vulnerability by setting a crafted Discretionary Access Control List (DACL) with a malformed Security Identifier (SID) in the ACL inheritance path. This can lead to a heap out-of-bounds read and subsequent heap corruption. Successful exploitation may result in kernel instability, denial of service, or potentially privilege escalation to kernel code execution."], "name": "CVE-2026-8449", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not 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": "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:enterprise_linux_nvidia:", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux for NVIDIA 26"}], "public_date": "2026-05-12T21:34:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-8449\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-8449\nhttps://github.com/torvalds/linux/blob/6596a02b207886e9e00bb0161c7fd59fea53c081/fs/smb/server/smbacl.c\nhttps://github.com/torvalds/linux/commit/996454bc0da84d5a1dedb1a7861823087e01a7ae\nhttps://www.vulncheck.com/advisories/linux-ksmbd-remote-memory-corruption-via-acl-inheritance"], "statement": "Red Hat products do not enable the affected functionality.", "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,996454b]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "ksmbd", "source": "cna", "vendor": "Linux"}, "product": "ksmbd", "vendor": "linux"}], "created": "2026-05-12T23:45:25.454297+00:00", "updated": "2026-05-13T10:35:23.437682+00:00", "vendors": ["linux", "linux$PRODUCT$ksmbd"]}