CVE-2026-90080 PUBLISHED

octeontx2-pf: fix NULL deref of af_xdp_zc_qidx on rep setup

Assigner: Linux
Reserved: 11.09.2026 Published: 17.09.2026 Updated: 17.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from efabce29015189cb5cd8066cf29eb1d754de6c3c to b003d5b4e46ca5033859db601e12d36da24d0e40 (excl.)
  • affected from efabce29015189cb5cd8066cf29eb1d754de6c3c to 7e33c6bd049b532d2ec4916895ef07e538bed905 (excl.)
  • affected from efabce29015189cb5cd8066cf29eb1d754de6c3c to b09a0503c755b6609fad59a84cc7f05b6843a03c (excl.)
  • Version 9bd7273cf1f9c5761d696cca821d25602e8f7009 is affected
  • affected from 6.14.9 to 6.15 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.15 is affected
  • unaffected from 0 to 6.15 (excl.)
  • unaffected from 6.18.52 to 6.18.* (incl.)
  • unaffected from 7.2.6 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References