CVE-2026-80733
Description
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.
How to fix
- Linux Linux97133c4d42654578fab95abe47359ebe784dde18, f625c742b33dc137c209dd13d1c5f12b1c18d71c, ad7fa2f411cb30f63d6725f111be134064cdb718, d2adc4e80b29e58b5162ae09f0f657a215806c8c, ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe, c8f256dc849205ccb2bd78bd99a3497b972b44e0, 0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f, b8a39a09ae4eaae04309e1e38ed6a1101d967496, 3.15, 3.19, 3.20 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < 97133c4d42654578fab95abe47359ebe784dde18, f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < f625c742b33dc137c209dd13d1c5f12b1c18d71c, f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < ad7fa2f411cb30f63d6725f111be134064cdb718, f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < d2adc4e80b29e58b5162ae09f0f657a215806c8c, f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe, f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < c8f256dc849205ccb2bd78bd99a3497b972b44e0, f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < 0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f, f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ≤ v < b8a39a09ae4eaae04309e1e38ed6a1101d967496, c91f81773cd4bbebfe744e9ab30a7ce093f9b930, c8c30b2b17f2133e953850c547e3902c3a3d80e2, 3fe207e4637a2e792c46a08666aa722f77d7f8f7, 3.14.40 ≤ v < 3.15, 3.18.13 ≤ v < 3.19, 3.19.6 ≤ v < 3.20, 4.0 | 97133c4d42654578fab95abe47359ebe784dde18, f625c742b33dc137c209dd13d1c5f12b1c18d71c, ad7fa2f411cb30f63d6725f111be134064cdb718, d2adc4e80b29e58b5162ae09f0f657a215806c8c, ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe, c8f256dc849205ccb2bd78bd99a3497b972b44e0, 0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f, b8a39a09ae4eaae04309e1e38ed6a1101d967496, 3.15, 3.19, 3.20 |
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