bpf: Don't predict JMP32 pointer vs zero comparisons (CVE-2026-98041) | HOL Guard CVE

High · CVSS 7.0CVE-2026-98041

bpf: Don't predict JMP32 pointer vs zero comparisons

Answer in brief

CVE-2026-98041 records a High severity (CVSS 7.0) vulnerability in bpf: Don't predict JMP32 pointer vs zero comparisons. 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	>=cac616db39c207dc63465a4e05c6ce0e60b2cce4 <d16f0eafcaa62e677a2b5b0dabc1f8d31dfe3d4d \|\| >=cac616db39c207dc63465a4e05c6ce0e60b2cce4 <e2ae33247e8b2dbe9d116d3e61cadf6d548339c6 \|\| >=cac616db39c207dc63465a4e05c6ce0e60b2cce4 <a4d7f94c1ca914469ced665ec2f98be669aef462 \|\| >=cac616db39c207dc63465a4e05c6ce0e60b2cce4 <e51179a4e09846f8fd0f26a05068520de2b301bf	d16f0eafcaa62e677a2b5b0dabc1f8d31dfe3d4d, e2ae33247e8b2dbe9d116d3e61cadf6d548339c6, a4d7f94c1ca914469ced665ec2f98be669aef462, e51179a4e09846f8fd0f26a05068520de2b301bf
Linux/Linuxgeneric	5.8	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to d16f0eafcaa62e677a2b5b0dabc1f8d31dfe3d4d 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: bpf: Don't predict JMP32 pointer vs zero comparisons Consider the following program: r1 = map_value; /* low 32 bits are zero at runtime */ r6 = 0xdead000000000000; if w1 != 0 goto l1; l0: r1 += r6; r2 = *(u64 *)(r1 + 0); exit; l1: r6 = 0; goto l0; At the moment is_branch_taken() reports the jump as always taken, because it does not distinguish between BPF_JMP and BPF_JMP32 comparisons when processing 'if w1 != 0 ...'.

Quoted source text, attributed separately from HOL analysis.