gve: fix NULL dereference due to missing ptp adjfine (CVE-2026-80564) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80564

gve: fix NULL dereference due to missing ptp adjfine

Answer in brief

CVE-2026-80564 records a Unknown severity vulnerability in gve: fix NULL dereference due to missing ptp adjfine. 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 Aug 26, 2026Updated Aug 26, 2026Source checked Aug 26, 2026First seen by HOL Aug 26, 2026Material review Aug 26, 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	>=acd16380523b400400523fe54c7499320e558e80 <e9482feeed66d4bc805458631013e9b61b1a9eaf \|\| >=acd16380523b400400523fe54c7499320e558e80 <fa9b991bf678dd412dc0ed080672d34d7558d7af \|\| >=acd16380523b400400523fe54c7499320e558e80 <3992ced109c70b771efad9e51ae68e5c7a04dea3	e9482feeed66d4bc805458631013e9b61b1a9eaf, fa9b991bf678dd412dc0ed080672d34d7558d7af, 3992ced109c70b771efad9e51ae68e5c7a04dea3
Linux/Linuxgeneric	6.17	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to e9482feeed66d4bc805458631013e9b61b1a9eaf if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 26, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: gve: fix NULL dereference due to missing ptp adjfine Fix NULL dereference due to missing implementation of adjfine, which can be triggered from usermode as follows: sudo ./testptp -d /dev/ptp0 -f 0 [ 551.943697] BUG: kernel NULL pointer dereference, address: 0000000000000000 [...] [ 552.061946] Call Trace: [ 552.064487] <TASK> [ 552.066681] ptp_clock_adjtime+0x1c0/0x2c0 [ 552.070874] ? get_clock_desc+0x6b/0xb0 [ 552.074825] pc_clock_adjtime+0x78/0xc0 [ 552.078755] __do_sys_clock_adjtime+0x85/0x110 [ 552.083293] do_syscall_64+0xea/0x610

Quoted source text, attributed separately from HOL analysis.