What’s Vulnerable › Vulnerabilities

CVE-2026-90085: octeontx2-af: fix NULL deref in NIX TM tree debugfs read path

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: fix NULL deref in NIX TM tree debugfs read path rvu_dbg_nix_tm_tree_display() dereferences pfvf->sq_ctx without checking whether the SQ context has been allocated. Reading /sys/kernel/debug/octeontx2/nix/tm_tree for a NIX LF whose transmit queues are not set up triggers a kernel oops. Guard the read path the same way rvu_dbg_nix_tm_tree_write() already does and return -EINVAL with a seq_file message when sq_ctx is NULL.

Affected products

• Linux kernel: 6.11 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/537e11a1700f64dc6754108f0e1333ad63d4f548
• https://git.kernel.org/stable/c/ec65631bd5ec251cdf67a4919fac7a3149a6e235
• https://git.kernel.org/stable/c/fb736d733b0a60377cf53010571c261886446fd5
• https://git.kernel.org/stable/c/fdf7358e2688f12eff41290bc45030b7aff0845e

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