{"id":"CVE-2026-98176","aliases":[],"cve":{"records":[{"id":"CVE-2026-98176","source":"Linux","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-09-25T10:25:14.322Z","published":"2026-10-06T08:44:20.004Z","modified":"2026-11-10T18:15:10.994Z"}],"publishers":[{"name":"Linux","role":"CNA","organizationId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","modified":"2026-11-10T18:15:10.994Z"}],"references":[{"url":"https://git.kernel.org/stable/c/1ab281c7ce2dc5195d337f2c16e22eba356b47f9","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/9e8f43579f849fba0dd1059160f50bd44a767366","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/82e1b8299c6da02ce02185c208d2fdf7572b5ea1","tags":[],"source":"Linux"},{"url":"https://git.kernel.org/stable/c/c883d0a132d430ef7ebb23fd94323be94d0fbdb8","tags":[],"source":"Linux"}],"weaknesses":[],"applicability":[{"source":"Linux","statements":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.12.117"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"6.18.61"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.3","versionEndExcluding":"7.3"}]}]}]}],"prioritization":[]},"title":"drm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc","titleSource":"Linux","descriptionSource":"Linux","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Avoid integer underflow with ffs in EOP ring size calc\n\nThe low 6 bits of cp_hqd_eop_control store the base-2 logarithm\nof the EOP ring size. This was calculated as\n\nffs(q->eop_ring_buffer_size / sizeof(unsigned int)) - 1 - 1\n\nBut ffs can in theory return 1 or 0, so this could underflow\n(although in practice the ring buffer size cannot be less than 4096).\n\nChange this to\n\nffs(q->eop_ring_buffer_size / sizeof(unsigned int) / 4)\n\nusing properties of logarithms.\n\n(cherry picked from commit 4f18c56630383c14bfc6b2d65f88f2f895d2121a)","score":null,"severity":"unknown","published":"2026-10-06T08:44:20.004Z","modified":"2026-11-10T18:15:10.994Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"14328aa58ce523a59996c5a82681c43ec048cc33","status":"affected","lessThan":"1ab281c7ce2dc5195d337f2c16e22eba356b47f9","versionType":"git"},{"version":"14328aa58ce523a59996c5a82681c43ec048cc33","status":"affected","lessThan":"9e8f43579f849fba0dd1059160f50bd44a767366","versionType":"git"},{"version":"14328aa58ce523a59996c5a82681c43ec048cc33","status":"affected","lessThan":"82e1b8299c6da02ce02185c208d2fdf7572b5ea1","versionType":"git"},{"version":"14328aa58ce523a59996c5a82681c43ec048cc33","status":"affected","lessThan":"c883d0a132d430ef7ebb23fd94323be94d0fbdb8","versionType":"git"}],"defaultStatus":"unaffected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98176"},{"vendor":"Linux","name":"Linux","platforms":[],"versions":[{"version":"5.3","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.3","versionType":"semver"},{"version":"6.12.117","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.61","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"defaultStatus":"affected","cpes":[],"source":"Linux","url":"https://www.cve.org/CVERecord?id=CVE-2026-98176"}],"remediation":[],"references":["https://git.kernel.org/stable/c/1ab281c7ce2dc5195d337f2c16e22eba356b47f9","https://git.kernel.org/stable/c/9e8f43579f849fba0dd1059160f50bd44a767366","https://git.kernel.org/stable/c/82e1b8299c6da02ce02185c208d2fdf7572b5ea1","https://git.kernel.org/stable/c/c883d0a132d430ef7ebb23fd94323be94d0fbdb8"],"sources":[{"name":"CVE","id":"CVE-2026-98176","modified":"2026-11-10T18:15:10.994Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-98176"}],"assessments":[],"sourceAffected":[],"observedAt":"2026-11-10T18:24:55.281Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:10:30.655Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-07T02:45:32.474Z","attemptedAt":"2026-11-07T02:45:32.474Z"},{"source":"GHSA","status":"available","checkedAt":"2026-11-07T02:45:31.873Z","attemptedAt":"2026-11-07T02:45:31.873Z"},{"source":"EUVD","status":"available","checkedAt":"2026-11-07T02:45:32.474Z","attemptedAt":"2026-11-07T02:45:32.474Z"},{"source":"EPSS","status":"available","checkedAt":"2026-11-07T02:45:32.474Z","attemptedAt":"2026-11-07T02:45:32.474Z"}],"evidence":[{"source":"GitHub Advisory Database","id":"GHSA-mv47-6r4w-p28q","url":"https://github.com/advisories/GHSA-mv47-6r4w-p28q","modified":"2026-11-06T18:35:58Z","checkedAt":"2026-11-07T02:45:31.873Z"},{"source":"NVD","id":"CVE-2026-98176","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98176","modified":"2026-11-06T18:18:28.800","checkedAt":"2026-11-07T02:45:32.474Z"},{"source":"ENISA EUVD","id":"EUVD-2026-93104","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-93104","modified":"Nov 6, 2026, 5:14:59 PM","checkedAt":"2026-11-07T02:45:32.474Z"},{"source":"FIRST EPSS","id":"CVE-2026-98176","url":"https://www.first.org/epss/","probability":0.00155,"percentile":0.04703,"date":"2026-11-06","checkedAt":"2026-11-07T02:45:32.474Z"}],"aiSummary":{"text":"The Linux kernel has an integer underflow vulnerability in the drm/amdkfd module. It occurs when calculating the EOP ring size using ffs, which can return 1 or 0, causing an underflow. The affected versions are Linux kernel versions prior to specific commits.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-10T18:41:15.705Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-98176"}]}}