Answer in brief
CVE-2026-80733 records a Unknown severity vulnerability in net: remove WARN_ON_ONCE() from sk_mc_loop(). 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.
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). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <97133c4d42654578fab95abe47359ebe784dde18 || >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <f625c742b33dc137c209dd13d1c5f12b1c18d71c || >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <ad7fa2f411cb30f63d6725f111be134064cdb718 || >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <d2adc4e80b29e58b5162ae09f0f657a215806c8c || >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe || >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <c8f256dc849205ccb2bd78bd99a3497b972b44e0 || >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f || >=f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 <b8a39a09ae4eaae04309e1e38ed6a1101d967496 || c91f81773cd4bbebfe744e9ab30a7ce093f9b930 || c8c30b2b17f2133e953850c547e3902c3a3d80e2 || 3fe207e4637a2e792c46a08666aa722f77d7f8f7 || >=3.14.40 <3.15 || >=3.18.13 <3.19 || >=3.19.6 <3.20 | 97133c4d42654578fab95abe47359ebe784dde18, f625c742b33dc137c209dd13d1c5f12b1c18d71c, ad7fa2f411cb30f63d6725f111be134064cdb718, d2adc4e80b29e58b5162ae09f0f657a215806c8c, ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe, c8f256dc849205ccb2bd78bd99a3497b972b44e0, 0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f, b8a39a09ae4eaae04309e1e38ed6a1101d967496, 3.15, 3.19, 3.20 |
| Linux/Linuxgeneric | 4.0 | Not reported |
Published upstream
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 3, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 3, 2026
In the Linux kernel, the following vulnerability has been resolved: net: remove WARN_ON_ONCE() from sk_mc_loop() sk_mc_loop() can be called for sockets that are neither AF_INET nor AF_INET6 (e.g. AF_PACKET sockets when sending packets via raw/packet socket over virtual devices such as VRF or ipvlan). In such cases, sk_family is not AF_INET/AF_INET6 and sk_mc_loop() falls through the switch statement and triggers WARN_ON_ONCE(1). Non-INET sockets do not support IP_MULTICAST_LOOP or IPV6_MULTICAST_LOOP options, so loopback should default to true without generating a warning.
Quoted source text, attributed separately from HOL analysis.