{"id":"CVE-2026-72089","summary":"accel/ivpu: Reject firmware log with size smaller than header","details":"In the Linux kernel, the following vulnerability has been resolved:\n\naccel/ivpu: Reject firmware log with size smaller than header\n\nfw_log_from_bo() validates the tracing buffer header_size and that the\nlog fits within the BO, but never checks that log-\u003esize is at least\nlog-\u003eheader_size. fw_log_print_buffer() then computes:\n\n  u32 data_size = log-\u003esize - log-\u003eheader_size;\n\nwhich underflows to a near-U32_MAX value when firmware reports a log whose\nsize is smaller than its header. That huge data_size defeats the\nlog_start/log_end bounds clamps added by commit dd1311bcf0e6 (\"accel/ivpu:\nAdd bounds checks for firmware log indices\"), so fw_log_print_lines() reads\nfar past the small real data region of the BO. A size of 0 also makes\nfw_log_from_bo() advance the offset by 0, causing the callers to loop\nforever on the same header.\n\nReject logs whose size is smaller than the header (which also rejects\nsize == 0).","modified":"2026-08-18T03:56:37.352684216Z","published":"2026-08-15T05:52:36.800Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72089.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/257321a1c036da417f5d9c47b95c7e58f62bf263"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5592a207e158b738d9c1d27f208dbbea13ae7606"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6920e62be4c969a68ce4ebc59da68c6cbc9512e5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dc9a1cda2e46d0254730a6f93cfe48532895f33c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ddb44baed257560f192b145ed36cf8c0a412de47"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72089.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72089"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d4e4257afa6ed5205eda993180401fc2c20e4b60"},{"fixed":"5592a207e158b738d9c1d27f208dbbea13ae7606"},{"fixed":"dc9a1cda2e46d0254730a6f93cfe48532895f33c"},{"fixed":"257321a1c036da417f5d9c47b95c7e58f62bf263"},{"fixed":"6920e62be4c969a68ce4ebc59da68c6cbc9512e5"},{"fixed":"ddb44baed257560f192b145ed36cf8c0a412de47"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72089.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.6.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72089.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H"}]}