{"id":"CVE-2026-98324","title":"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…","summary":"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…","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","vendor":"Linux","product":"Linux","affected":["Linux >= 69050f8d6d075dc01af7a5f2f550a8067510366f < 1de93785f32b450e9eae1e4fcfb7d03eb49eb27e","Linux >= 69050f8d6d075dc01af7a5f2f550a8067510366f < f6504be006aa4bb4bd26285f410a885c17920d65","Linux 7.0"],"published":"2026-10-06","updated":"2026-10-07","sourceUpdated":"2026-10-07T07:17:09.147","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98324","references":[{"url":"https://git.kernel.org/stable/c/1de93785f32b450e9eae1e4fcfb7d03eb49eb27e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f6504be006aa4bb4bd26285f410a885c17920d65","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98324.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98324"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2546469"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98324"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98324"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98324.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00129,"epssPercentile":0.02558,"ingestedAt":"2026-10-06T08:50:17.406Z","cwe":["CWE-787"],"scores":{"nvd":7.8,"vendor":5.5,"cna":7.8},"slug":"CVE-2026-98324","body":"## Overview\n\nIn 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->nb_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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-10 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98324.json)","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":217328,"id":"CVE-2026-98324","ts":1791361314975,"field":"cvss","old":null,"new":"7.8"},{"seq":217327,"id":"CVE-2026-98324","ts":1791361314975,"field":"severity","old":"none","new":"high"}]}