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

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Summary

CVECVE-2026-90080
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-17 17:16:57 UTC
Updated2026-09-17 17:16:57 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected efabce29015189cb5cd8066cf29eb1d754de6c3c b003d5b4e46ca5033859db601e12d36da24d0e40 git Not specified
CNA Linux Linux affected efabce29015189cb5cd8066cf29eb1d754de6c3c 7e33c6bd049b532d2ec4916895ef07e538bed905 git Not specified
CNA Linux Linux affected efabce29015189cb5cd8066cf29eb1d754de6c3c b09a0503c755b6609fad59a84cc7f05b6843a03c git Not specified
CNA Linux Linux affected 9bd7273cf1f9c5761d696cca821d25602e8f7009 git Not specified
CNA Linux Linux affected 6.14.9 6.15 semver Not specified
CNA Linux Linux affected 6.15 Not specified
CNA Linux Linux unaffected 6.15 semver Not specified
CNA Linux Linux unaffected 6.18.52 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.6 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/7e33c6bd049b532d2ec4916895ef07e538bed905 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b003d5b4e46ca5033859db601e12d36da24d0e40 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/b09a0503c755b6609fad59a84cc7f05b6843a03c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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