Riskcovery

CVE-2026-90080

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

State
Published
Severity
Not scored
Published
Sep 17, 2026
Updated
Oct 19, 2026
Reserved
Sep 11, 2026

Read the record on cve.org

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • efabce29015189cb5cd8066cf29eb1d754de6c3c to before b003d5b4e46ca5033859db601e12d36da24d0e40Affected
  • efabce29015189cb5cd8066cf29eb1d754de6c3c to before 7e33c6bd049b532d2ec4916895ef07e538bed905Affected
  • efabce29015189cb5cd8066cf29eb1d754de6c3c to before b09a0503c755b6609fad59a84cc7f05b6843a03cAffected
  • 9bd7273cf1f9c5761d696cca821d25602e8f7009Affected
  • 6.14.9 to before 6.15Affected
LinuxLinux
  • 6.15Affected
  • before 6.15Not affected
  • 6.18.52 through 6.18.*Not affected
  • 7.2.6 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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