--- cve: "CVE-2026-43205" severity: "LOW" cvss: 3.1 epss: "14%" vendor: "Linux" kev: false exploited: false published: "2026-05-06 12:16:39" tags: [cve, security, low] source: tsecurity.de CVE-Dossier exported: "2026-09-08T22:49:36+02:00" --- # CVE-2026-43205 > 3.1 LOW ## Beschreibung In the Linux kernel, the following vulnerability has been resolved: dpaa2-switch: validate num_ifs to prevent out-of-bounds write The driver obtains sw_attr.num_ifs from firmware via dpsw_get_attributes() but never validates it against DPSW_MAX_IF (64). This value controls iteration in dpaa2_switch_fdb_get_flood_cfg(), which writes port indices into the fixed-size cfg->if_id[DPSW_MAX_IF] array. When firmware reports num_ifs >= 64, the loop can write past the array bounds. Add a bound check for num_ifs in dpaa2_switch_init(). dpaa2_switch_fdb_get_flood_cfg() appends the control interface (port num_ifs) after all matched ports. When num_ifs == DPSW_MAX_IF and all ports match the flood filter, the loop fills all 64 slots and the control interface write overflows by one entry. The check uses >= because num_ifs == DPSW_MAX_IF is also functionally broken. build_if_id_bitmap() silently drops any ID >= 64: if (id[i] < DPSW_MAX_IF) bmap[id[i] / 64] |= ... ## Patch verfügbar (OSV) - Kernel ≥ 5.15.202 - Kernel ≥ 6.1.165 - Kernel ≥ 6.6.128 - Kernel ≥ 6.12.75 - Kernel ≥ 6.18.16 - Kernel ≥ 6.19.6 ## Referenzen - - - - - - - --- _Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-43205) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_