net: remove WARN_ON_ONCE() from sk_mc_loop()
Summary
| CVE | CVE-2026-80733 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-09-03 13:06:12 UTC |
| Updated | 2026-09-03 13:06:12 UTC |
| 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. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.111730000 (date 2026-09-03)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 97133c4d42654578fab95abe47359ebe784dde18 git | Not specified |
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 f625c742b33dc137c209dd13d1c5f12b1c18d71c git | Not specified |
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ad7fa2f411cb30f63d6725f111be134064cdb718 git | Not specified |
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 d2adc4e80b29e58b5162ae09f0f657a215806c8c git | Not specified |
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe git | Not specified |
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 c8f256dc849205ccb2bd78bd99a3497b972b44e0 git | Not specified |
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f git | Not specified |
| CNA | Linux | Linux | affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 b8a39a09ae4eaae04309e1e38ed6a1101d967496 git | Not specified |
| CNA | Linux | Linux | affected c91f81773cd4bbebfe744e9ab30a7ce093f9b930 git | Not specified |
| CNA | Linux | Linux | affected c8c30b2b17f2133e953850c547e3902c3a3d80e2 git | Not specified |
| CNA | Linux | Linux | affected 3fe207e4637a2e792c46a08666aa722f77d7f8f7 git | Not specified |
| CNA | Linux | Linux | affected 3.14.40 3.15 semver | Not specified |
| CNA | Linux | Linux | affected 3.18.13 3.19 semver | Not specified |
| CNA | Linux | Linux | affected 3.19.6 3.20 semver | Not specified |
| CNA | Linux | Linux | affected 4.0 | Not specified |
| CNA | Linux | Linux | unaffected 4.0 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.265 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.216 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.183 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.152 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.104 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.45 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.9 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/ad7fa2f411cb30f63d6725f111be134064cdb718 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/97133c4d42654578fab95abe47359ebe784dde18 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b8a39a09ae4eaae04309e1e38ed6a1101d967496 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c8f256dc849205ccb2bd78bd99a3497b972b44e0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f625c742b33dc137c209dd13d1c5f12b1c18d71c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/d2adc4e80b29e58b5162ae09f0f657a215806c8c | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.