{"id":"CVE-2026-98324","summary":"dmaengine: pxa: fix double counting of the hw descriptors","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: pxa: fix double counting of the hw descriptors\n\npxad_alloc_desc() was converted from\n\n        kzalloc(struct_size(sw_desc, hw_desc, nb_hw_desc), GFP_NOWAIT)\n\nto kzalloc_flex(), which sets the __counted_by() counter sw_desc-\u003enb_desc\nitself - but only where the compiler has __builtin_counted_by_ref(), so\nfrom gcc 15.1 or clang 22.1 on. The loop below it still increments\nnb_desc, which makes it come out doubled there and correct elsewhere.\n\nnb_desc is what pxad_free_desc() iterates over and what\nset_updater_desc() indexes from, so set it explicitly and drop the\nincrement. The error path has to lower it to the number of descriptors\nallocated so far, otherwise pxad_free_desc() would free entries that were\nnever allocated.","modified":"2026-10-08T02:52:57.054963926Z","published":"2026-10-06T08:46:17.919Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98324.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/1de93785f32b450e9eae1e4fcfb7d03eb49eb27e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f6504be006aa4bb4bd26285f410a885c17920d65"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98324.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98324"},{"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":"69050f8d6d075dc01af7a5f2f550a8067510366f"},{"fixed":"1de93785f32b450e9eae1e4fcfb7d03eb49eb27e"},{"fixed":"f6504be006aa4bb4bd26285f410a885c17920d65"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98324.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.0.0"},{"fixed":"7.2.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98324.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:H/A:H"}]}