CVE-2026-64040

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{}

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{"bugzilla": {"description": "kernel: cachefiles: Fix error return when vfs_mkdir() fails", "id": "2502499", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502499"}, "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-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ncachefiles: Fix error return when vfs_mkdir() fails\nWhen vfs_mkdir() fails, the error code is not extracted from the\nreturned error pointer. This causes mkdir_error to be reached with\nret=0, which leads to returning ERR_PTR(0) (NULL) instead of a\nproper error pointer.\nFix this by extracting the error code from the error pointer when\nvfs_mkdir() fails.", "A flaw was found in the Linux kernel's cachefiles subsystem. When the `vfs_mkdir()` function fails, the system does not correctly extract the error code from the returned error pointer. This improper handling can lead to a null pointer being returned instead of a valid error, potentially causing a system crash and resulting in a Denial of Service (DoS)."], "name": "CVE-2026-64040", "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": "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": "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"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64040\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64040\nhttps://lore.kernel.org/linux-cve-announce/2026071906-CVE-2026-64040-6908@gregkh/T"], "threat_severity": "Low"}

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