CVE-2026-80733net: remove WARN_ON_ONCE() from sk_mc_loop()
- —Not scoredno CVSS score yet
- 0.18%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 8 days later
· 8 days later
Published
- 2 months later
· 2 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.18% · top 93% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < 97133c4d42654578fab95abe47359ebe784dde18
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < f625c742b33dc137c209dd13d1c5f12b1c18d71c
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < ad7fa2f411cb30f63d6725f111be134064cdb718
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < d2adc4e80b29e58b5162ae09f0f657a215806c8c
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < c8f256dc849205ccb2bd78bd99a3497b972b44e0
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < 0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f
- affected f60e5990d9c1424af9dbca60a23ba2a1c7c1ce90 – < b8a39a09ae4eaae04309e1e38ed6a1101d967496
- affected c91f81773cd4bbebfe744e9ab30a7ce093f9b930
- affected c8c30b2b17f2133e953850c547e3902c3a3d80e2
- affected 3fe207e4637a2e792c46a08666aa722f77d7f8f7
- affected 3.14.40 – < 3.15
- affected 3.18.13 – < 3.19
- affected 3.19.6 – < 3.20
- affected 4.0
- unaffected < 4.0
- unaffected 5.10.265 – ≤ 5.10.*
- unaffected 5.15.216 – ≤ 5.15.*
- unaffected 6.1.183 – ≤ 6.1.*
- unaffected 6.6.152 – ≤ 6.6.*
- unaffected 6.12.104 – ≤ 6.12.*
- unaffected 6.18.45 – ≤ 6.18.*
- unaffected 7.1.9 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/97133c4d42654578fab95abe47359ebe784dde18 (opens in a new tab)
- https://git.kernel.org/stable/c/f625c742b33dc137c209dd13d1c5f12b1c18d71c (opens in a new tab)
- https://git.kernel.org/stable/c/ad7fa2f411cb30f63d6725f111be134064cdb718 (opens in a new tab)
- https://git.kernel.org/stable/c/d2adc4e80b29e58b5162ae09f0f657a215806c8c (opens in a new tab)
- https://git.kernel.org/stable/c/ad7dbb1d14b1b4406eca8ef9478e8de312ba0cfe (opens in a new tab)
- https://git.kernel.org/stable/c/c8f256dc849205ccb2bd78bd99a3497b972b44e0 (opens in a new tab)
- https://git.kernel.org/stable/c/0d75f2c1d0764efa756ad9c1e078d8c09ea8fc1f (opens in a new tab)
- https://git.kernel.org/stable/c/b8a39a09ae4eaae04309e1e38ed6a1101d967496 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-70337 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-80733)Record last updated .