bpf: Disable preemption in bpf_get_stackid

Answer in brief

CVE-2026-89799 records a Unknown severity vulnerability in bpf: Disable preemption in bpf_get_stackid. 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 16, 2026Updated Sep 16, 2026Source checked Sep 16, 2026First seen by HOL Sep 16, 2026Material review Sep 16, 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	>=d5a3b1f691865be576c2bffa708549b8cdccda19 <ccf481d73bce6e851cec364fe831c86fe66877cf \|\| >=d5a3b1f691865be576c2bffa708549b8cdccda19 <c4efdc1d4cb3e9183e41a1b2a5e0901dbbb31cdf \|\| >=d5a3b1f691865be576c2bffa708549b8cdccda19 <15f1bd8574662f1b7b26aaa2e23ebf4066f0117d	ccf481d73bce6e851cec364fe831c86fe66877cf, c4efdc1d4cb3e9183e41a1b2a5e0901dbbb31cdf, 15f1bd8574662f1b7b26aaa2e23ebf4066f0117d
Linux/Linuxgeneric	4.6	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to ccf481d73bce6e851cec364fe831c86fe66877cf if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 16, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 16, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: bpf: Disable preemption in bpf_get_stackid The get_perf_callchain call needs disabled preemption plus we need it disabled as long as we access its returned trace entries buffer. Note the bpf_get_stackid_pe function is executed already with preemption disabled.

Quoted source text, attributed separately from HOL analysis.