{"id":"CVE-2026-90080","published":"2026-09-17T17:16:57.317","lastModified":"2026-09-17T17:16:57.317","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-pf: fix NULL deref of af_xdp_zc_qidx on rep setup\n\naf_xdp_zc_qidx tracks receive queues using AF_XDP zero-copy and is\nallocated during PF/VF probe. Representors and other non-AF_XDP paths\nleave the pointer NULL, but several call sites used test_bit() on it\nunconditionally.\n\nSwitching to devlink eswitch mode creates representors and runs\notx2_init_hw_resources(), which reaches otx2_pool_aq_init() and oopses\nwhen dereferencing the NULL bitmap. Add NULL checks before every\naf_xdp_zc_qidx test_bit() use in the RSS, ethtool, XSK, and pool init\npaths.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/7e33c6bd049b532d2ec4916895ef07e538bed905","tags":[]},{"url":"https://git.kernel.org/stable/c/b003d5b4e46ca5033859db601e12d36da24d0e40","tags":[]},{"url":"https://git.kernel.org/stable/c/b09a0503c755b6609fad59a84cc7f05b6843a03c","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}