AEGLIX investigation
CVE-2026-98550 research
A source-linked research view connecting vulnerability evidence, reviewed campaign mentions, retained reporting and security tool listings.
Evidence summary
In the Linux kernel, the following vulnerability has been resolved: tipc: reject invalid and unexpected GRP_ACK_MSG to prevent bc_ackers underflow Commit 48a5fe38772b ("tipc: fix bc_ackers underflow on duplicate GRP_ACK_MSG") rejected duplicate/stale ACKs in tipc_group_proto_rcv() by returning early when less_eq(acked, m->bc_acked). However, that check remains incomplete in two ways: 1. When grp->bc_ackers is zero (e.g. on a quiet group, when replicast ACKs were not requested, or after all expected members have already acknowledged), an unexpected GRP_ACK_MSG with acked > m->bc_acked passes less_eq() and unconditionally decrements grp->bc_ackers. Because bc_ackers is a u16...
Assess exposure and vendor guidance
- No higher-priority signal is available in the current stored evidence.
CVSS: 7.5 · EPSS: 0.68% (2026-10-27)
Source retrieved 2026-10-28T10:23:21.412233+00:00. Read the full record and affected versions before making a patch decision.
Campaign content mentioning this CVE
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No exact mention was found in the checked published campaign content.
Stored reporting mentioning this CVE
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No exact mention was found in the checked stored news excerpts.
Investigate advisory publishers
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- git.kernel.org
Find referenced tools in Arsenal
Search published listings whose documented CVE-reference field contains CVE-2026-98550. An empty result is valid. A reference does not establish safety, exploit reliability or suitability for your environment.
Search exact CVE references in Arsenal
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Coverage and interpretation
Exact CVE mentions in stored public excerpts and reviewed campaign content only. A mention is not proof of exploitation, attribution or tool suitability. Missing matches do not establish absence.
Checked up to 100 candidate excerpts and 100 candidate campaigns; at most 10 results per section are shown. No external search or scan ran while loading this page.