octeontx2-af: fix NULL deref in NIX TM tree debugfs read path (CVE-2026-90085) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-90085

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

Answer in brief

CVE-2026-90085 records a Unknown severity vulnerability in octeontx2-af: fix NULL deref in NIX TM tree debugfs read path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 17, 2026Updated Sep 17, 2026Source checked Sep 17, 2026First seen by HOL Sep 17, 2026Material review Sep 17, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=b907194a5d5bcd3b01d28d095f6a4d9fcd9c5354 <fb736d733b0a60377cf53010571c261886446fd5 \|\| >=b907194a5d5bcd3b01d28d095f6a4d9fcd9c5354 <537e11a1700f64dc6754108f0e1333ad63d4f548 \|\| >=b907194a5d5bcd3b01d28d095f6a4d9fcd9c5354 <fdf7358e2688f12eff41290bc45030b7aff0845e \|\| >=b907194a5d5bcd3b01d28d095f6a4d9fcd9c5354 <ec65631bd5ec251cdf67a4919fac7a3149a6e235	fb736d733b0a60377cf53010571c261886446fd5, 537e11a1700f64dc6754108f0e1333ad63d4f548, fdf7358e2688f12eff41290bc45030b7aff0845e, ec65631bd5ec251cdf67a4919fac7a3149a6e235
Linux/Linuxgeneric	6.11	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to fb736d733b0a60377cf53010571c261886446fd5 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 17, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.