{"id":"CVE-2025-38466","title":"kernel: Linux kernel: Denial of Service in uprobes due to improper instruction validation (CVE-2025-38466)","summary":"A flaw was found in the Linux kernel's uprobes functionality. A local attacker with elevated privileges could exploit this vulnerability by using uprobes destructively in the middle of an instruction. This is possible because the kernel in…","severity":"medium","cvss":4.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-266","vendor":"Red Hat","product":"Red Hat Enterprise Linux 9","affected":["enterprise_linux 10","enterprise_linux 8","enterprise_linux 9"],"published":"2025-07-25","updated":"2026-10-16","sourceUpdated":"2026-10-16T22:55:55+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38466.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38466.json"},{"url":"https://access.redhat.com/security/cve/CVE-2025-38466"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2383482"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-38466"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38466"},{"url":"https://lore.kernel.org/linux-cve-announce/2025072508-CVE-2025-38466-11e8@gregkh/T"},{"url":"https://git.kernel.org/stable/c/d7ef1afd5b3f43f4924326164cee5397b66abd9c"},{"url":"https://git.kernel.org/stable/c/c0aec35f861fa746ca45aa816161c74352e6ada8"},{"url":"https://git.kernel.org/stable/c/8e8bf7bc6aa6f583336c2fda280b6cea0aed5612"},{"url":"https://git.kernel.org/stable/c/183bdb89af1b5193b1d1d9316986053b15ca6fa4"},{"url":"https://git.kernel.org/stable/c/a0a8009083e569b5526c64f7d3f2a62baca95164"},{"url":"https://git.kernel.org/stable/c/d5074256b642cdeb46a70ce2f15193e766edca68"},{"url":"https://git.kernel.org/stable/c/ba677dbe77af5ffe6204e0f3f547f3ba059c6302"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00217,"epssPercentile":0.11522,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:50:41.107124Z"},"scores":{"vendor":4.4,"cna":7.8},"ingestedAt":"2026-10-15T05:52:46.087Z","slug":"CVE-2025-38466","body":"## Overview\n\nA flaw was found in the Linux kernel's uprobes functionality. A local attacker with elevated privileges could exploit this vulnerability by using uprobes destructively in the middle of an instruction. This is possible because the kernel incorrectly validates instructions, potentially mistaking data for executable code on some architectures. Successful exploitation could lead to a denial of service (DoS) on the affected system.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-16 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-38466.json)\n\n**kernel: Linux kernel: Denial of Service in uprobes due to improper instruction validation** — rated Moderate by Red Hat. Released 2025-07-25, updated 2026-10-16.\n\nAffected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNo fix planned:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n\nNot affected:\n\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n\n## Remediation\n\nFix deferred\n\nWorkarounds / mitigations:\n\n- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":24.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":223725,"id":"CVE-2025-38466","ts":1792238377578,"field":"cvss","old":"7.8","new":"4.4"},{"seq":223724,"id":"CVE-2025-38466","ts":1792238377578,"field":"severity","old":"high","new":"medium"}]}