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

Undergoing analysis
AliasesUBUNTU-CVE-2026-98089DEBIAN-CVE-2026-98089
Published 25-09-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-98089 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 6.7% of scored vulnerabilities.

Priority
Insufficient evidence

No CVSS vector published; no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 12 · Related 10
MGASA-2026-0506MGASA-2026-0542OPENSUSE-SU-2026:12074-1OPENSUSE-SU-2026:22167-1SUSE-SU-2026:24371-1SUSE-SU-2026:24379-1

Timeline

  1. 25-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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().

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

7%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.17% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: not stated in public data.

Ubuntu142 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.7-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549, < 862c8eb6947689c44fe11353755576a3672563a5 | ≥ 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549, < 7adb1bf25b0c5cedfb49b6e82844394d4f3c0d99 | ≥ 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549, < e39cf90bd856443542b97933289749fca07476bf | ≥ 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549, < 27314f96d29b54e815e7a9b84c3273f1895e68e2 | ≥ 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549, < 3b178894931a268c09126a5b53630f343e10e296 | ≥ 0da8aa00bfcfeb3f4e6537dd8e2001e0727ba549, < 70f3995830d3f1e79faa14eb0605914f778feca9 | 5.18

3 vendors · 145 products

References

9 links