CVE-2026-90080
Description
In the Linux kernel, the following vulnerability has been resolved: octeontx2-pf: fix NULL deref of af_xdp_zc_qidx on rep setup af_xdp_zc_qidx tracks receive queues using AF_XDP zero-copy and is allocated during PF/VF probe. Representors and other non-AF_XDP paths leave the pointer NULL, but several call sites used test_bit() on it unconditionally. Switching to devlink eswitch mode creates representors and runs otx2_init_hw_resources(), which reaches otx2_pool_aq_init() and oopses when dereferencing the NULL bitmap. Add NULL checks before every af_xdp_zc_qidx test_bit() use in the RSS, ethtool, XSK, and pool init paths.
How to fix
- Linux Linuxb003d5b4e46ca5033859db601e12d36da24d0e40, 7e33c6bd049b532d2ec4916895ef07e538bed905, b09a0503c755b6609fad59a84cc7f05b6843a03c, 6.15 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | efabce29015189cb5cd8066cf29eb1d754de6c3c ≤ v < b003d5b4e46ca5033859db601e12d36da24d0e40, efabce29015189cb5cd8066cf29eb1d754de6c3c ≤ v < 7e33c6bd049b532d2ec4916895ef07e538bed905, efabce29015189cb5cd8066cf29eb1d754de6c3c ≤ v < b09a0503c755b6609fad59a84cc7f05b6843a03c, 9bd7273cf1f9c5761d696cca821d25602e8f7009, 6.14.9 ≤ v < 6.15, 6.15 | b003d5b4e46ca5033859db601e12d36da24d0e40, 7e33c6bd049b532d2ec4916895ef07e538bed905, b09a0503c755b6609fad59a84cc7f05b6843a03c, 6.15 |
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