eth: nfp: bound the ntuple rule dump by the caller's buffer size (CVE-2026-98029) | HOL Guard CVE

High · CVSS 7.0CVE-2026-98029

eth: nfp: bound the ntuple rule dump by the caller's buffer size

Answer in brief

CVE-2026-98029 records a High severity (CVSS 7.0) vulnerability in eth: nfp: bound the ntuple rule dump by the caller's buffer size. 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 25, 2026Updated Sep 25, 2026Source checked Sep 25, 2026First seen by HOL Sep 25, 2026Material review Sep 25, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.0
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.0. 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	>=9eb03bb1c035ff6e2c3a34046419446588253dda <82812583b9c69c241da6da4186f14e9df2516488 \|\| >=9eb03bb1c035ff6e2c3a34046419446588253dda <a7e023c63e855761c1426cee8d17c2bca32aa339 \|\| >=9eb03bb1c035ff6e2c3a34046419446588253dda <ecebfdaab72a504c10f4907bd00fc3b705ec3b12 \|\| >=9eb03bb1c035ff6e2c3a34046419446588253dda <f1986bf87b0709c95126fe196cf39e5b8c8453a1	82812583b9c69c241da6da4186f14e9df2516488, a7e023c63e855761c1426cee8d17c2bca32aa339, ecebfdaab72a504c10f4907bd00fc3b705ec3b12, f1986bf87b0709c95126fe196cf39e5b8c8453a1
Linux/Linuxgeneric	6.8	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 82812583b9c69c241da6da4186f14e9df2516488 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 25, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 25, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: eth: nfp: bound the ntuple rule dump by the caller's buffer size nfp_net_get_fs_loc() dumps every entry of nn->fs.list into rule_locs[] without consulting cmd->rule_cnt, which is how many entries the caller had room for. ETHTOOL_GRXCLSRLALL requires no CAP_NET_ADMIN and the ioctl sizes the buffer from the rule_cnt userspace passes in, so once an admin has installed flow steering rules any user can ask for fewer slots than there are rules and run off the end of the allocation. A rule_cnt of 0 leaves the buffer pointer NULL and the walk dereferences it. Bail out with -EMSGSIZE when the buffer fills up, the way the other ntuple capable drivers do, and report how many locations were filled so a shrinking rule list does not leave the caller reading stale slots.

Quoted source text, attributed separately from HOL analysis.