bonding: alb: fix uninitialized transport header access in alb_determine_nd() (CVE-2026-98089) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-98089

bonding: alb: fix uninitialized transport header access in alb_determine_nd()

Answer in brief

CVE-2026-98089 records a Unknown severity vulnerability in bonding: alb: fix uninitialized transport header access in alb_determine_nd(). 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: 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	>=0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 <e39cf90bd856443542b97933289749fca07476bf \|\| >=0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 <27314f96d29b54e815e7a9b84c3273f1895e68e2 \|\| >=0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 <3b178894931a268c09126a5b53630f343e10e296 \|\| >=0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549 <70f3995830d3f1e79faa14eb0605914f778feca9	e39cf90bd856443542b97933289749fca07476bf, 27314f96d29b54e815e7a9b84c3273f1895e68e2, 3b178894931a268c09126a5b53630f343e10e296, 70f3995830d3f1e79faa14eb0605914f778feca9
Linux/Linuxgeneric	5.18	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to e39cf90bd856443542b97933289749fca07476bf 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: bonding: alb: fix uninitialized transport header access in alb_determine_nd() alb_determine_nd() uses icmp6_hdr(skb) to inspect ICMPv6 headers. However, in xmit paths (e.g. packets sent via AF_PACKET / raw sockets or forwarded packets), skb->transport_header is not guaranteed to be initialized. While pskb_network_may_pull() ensures the packet data is linear starting from the network header, it does not set or adjust the transport header offset. Dereferencing icmp6_hdr(skb) can therefore access out-of-bounds memory. Fetch the icmp6hdr directly after ipv6hdr following pskb_network_may_pull(), and reload ipv6hdr in case pskb_may_pull() reallocated skb->head. Also remove the unused bond argument from alb_determine_nd().

Quoted source text, attributed separately from HOL analysis.