Answer in brief
CVE-2026-98794 records a Unknown severity vulnerability in ipvs: filter some flags received in the backup server. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), 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.
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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | 2.6.14 | Not reported |
| Linux/Linuxgeneric | >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <f4cd1db7d421e82945713a36084bb0c35b75b27e || >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <55d033324f67a15ff56be6d38d6e87f644e0ed62 || >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <45a93111835ccfea7d969ec73588e33745fd9834 || >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <f96e91748f6304668fe647e686d199d7207d36f1 | f4cd1db7d421e82945713a36084bb0c35b75b27e, 55d033324f67a15ff56be6d38d6e87f644e0ed62, 45a93111835ccfea7d969ec73588e33745fd9834, f96e91748f6304668fe647e686d199d7207d36f1 |
| Linux/Linuxgeneric | >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <d7d33c9efa9d1a2f244a1a64ec9b540b0f8975a0 || >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <f4cd1db7d421e82945713a36084bb0c35b75b27e || >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <55d033324f67a15ff56be6d38d6e87f644e0ed62 || >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <45a93111835ccfea7d969ec73588e33745fd9834 || >=87375ab47cd0ba04124c6d3fd80db5c368f5dcb6 <f96e91748f6304668fe647e686d199d7207d36f1 | d7d33c9efa9d1a2f244a1a64ec9b540b0f8975a0, f4cd1db7d421e82945713a36084bb0c35b75b27e, 55d033324f67a15ff56be6d38d6e87f644e0ed62, 45a93111835ccfea7d969ec73588e33745fd9834, f96e91748f6304668fe647e686d199d7207d36f1 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: ipvs: filter some flags received in the backup server While the IPVS SYNC protocol is not secure by design we can still protect the backup server from messages that can wreak havoc. This commit addresses problems from received connection flags or their combinations. We now drop messages as follows: 1. the NO_CPORT+TEMPLATE combination allows lookups for normal connections to hit template which can break in many ways. While the master does not sync connections with NO_CPORT flag, i.e. before they are established, we still accept NO_CPORT without TEMPLATE. 2. ONE_PACKET: it is not sent by master, so we do not expect it in backup. Before now it was ignored by IP_VS_CONN_F_BACKUP_MASK for protocol v1 while protocol v0 created connections that are not hashed and dropped immediately. Better to apply the IP_VS_CONN_F_BACKUP_MASK also to the flags from v0 messages for consistency with v1.
Quoted source text, attributed separately from HOL analysis.