{"id":"CVE-2025-40081","title":"perf: arm_spe: Prevent overflow in PERF_IDX2OFF()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nperf: arm_spe: Prevent overflow in PERF_IDX2OFF()\n\nCast nr_pages to unsigned long to avoid overflow when handling large\nAUX buffer sizes (>= 2 GiB).","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 656e9a5d69acdd1b20462f4a33378b90ddcb9626","Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 9c045d4501f7f70724a3bbb561f4f22d292bbfe6","Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 5d01f2b81568289443d22f1e13a363f829de6343","Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 7500384d3c9587593d75ded3b006835e7aa73ef8","Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 379cae2cb982f571cda9493ac573ab71125fd299","Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 1a19ba8e1f4ff24ece8ca69b79df8442c431db90","Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < e516cfd19b0f4c774a57b17fb43a7f41991f0735","Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < a29fea30dd93da16652930162b177941abd8c75e","Linux 4.15"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-15T21:56:43.611759Z"},"published":"2025-10-28","updated":"2026-10-15","sourceUpdated":"2026-10-15T22:02:37.490Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40081","references":[{"url":"https://git.kernel.org/stable/c/656e9a5d69acdd1b20462f4a33378b90ddcb9626"},{"url":"https://git.kernel.org/stable/c/9c045d4501f7f70724a3bbb561f4f22d292bbfe6"},{"url":"https://git.kernel.org/stable/c/5d01f2b81568289443d22f1e13a363f829de6343"},{"url":"https://git.kernel.org/stable/c/7500384d3c9587593d75ded3b006835e7aa73ef8"},{"url":"https://git.kernel.org/stable/c/379cae2cb982f571cda9493ac573ab71125fd299"},{"url":"https://git.kernel.org/stable/c/1a19ba8e1f4ff24ece8ca69b79df8442c431db90"},{"url":"https://git.kernel.org/stable/c/e516cfd19b0f4c774a57b17fb43a7f41991f0735"},{"url":"https://git.kernel.org/stable/c/a29fea30dd93da16652930162b177941abd8c75e"}],"tags":["cve.org"],"epss":0.00154,"epssPercentile":0.04522,"ingestedAt":"2026-10-15T22:48:25.545Z","slug":"CVE-2025-40081","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nperf: arm_spe: Prevent overflow in PERF_IDX2OFF()\n\nCast nr_pages to unsigned long to avoid overflow when handling large\nAUX buffer sizes (>= 2 GiB).\n\n## Affected\n\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 656e9a5d69acdd1b20462f4a33378b90ddcb9626`\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 9c045d4501f7f70724a3bbb561f4f22d292bbfe6`\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 5d01f2b81568289443d22f1e13a363f829de6343`\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 7500384d3c9587593d75ded3b006835e7aa73ef8`\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 379cae2cb982f571cda9493ac573ab71125fd299`\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < 1a19ba8e1f4ff24ece8ca69b79df8442c431db90`\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < e516cfd19b0f4c774a57b17fb43a7f41991f0735`\n- `Linux >= d5d9696b03808bc6be723cc85288c912c3a05606 < a29fea30dd93da16652930162b177941abd8c75e`\n- `Linux 4.15`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}