CVE-2026-80989net: thunderbolt: Mark the connection down when bringing it up fails
- 8.8HighCVSS base score
- 0.35%Exploitation in 30 daysEPSS · top 71% 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: thunderbolt: Mark the connection down when bringing it up fails Every failure path in tbnet_connected_work() undoes its own work and returns without clearing login_sent, so the connection still looks established. The next tbnet_tear_down() therefore takes its main branch and repeats a teardown that already happened: it stops rings that are already stopped, which is a dev_WARN() and fatal under panic_on_warn, and it releases net->remote_transmit_path even on the HopID mismatch path, where this connection never owned that id, silently freeing one that someone else is still using. Clear login_sent on those paths. That is enough for tbnet_tear_down() to leave the unwound state alone, and login_received has to stay set: it records that the peer has logged in and carries the transmit path it gave us, which nothing on this side can make the peer send again. Two things change beyond keeping the teardown out of the way: the logout request in that block is no longer sent, and the peer's next login request now re-queues our login work rather than connected_work, giving the connection a fresh login instead of a retry on stale state.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 49 days later
· 49 days 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.35% · top 71% of all CVEs (15 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e – < c18f4ce9e2cb8836c302ef30a1e3392a0233c7b3
- affected e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e – < e0d4a17afde5aa0045dc3e1d66c6bb80927bad8c
- affected e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e – < ed1d6e3d735e7b03f43a02f4306c89eb7663da14
- affected e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e – < f01e6a35c440b62f060e21f36b385e574a7f308c
- affected e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e – < d6c0af293129345a17dc31c9b4179dc7f3d6af7a
- affected e69b6c02b4c3b8d03be7136f90dd9551ad5a5a5e – < 3c8b26ebf525ba5960510f48c6e9936a79ebe76f
- affected 4.15
- unaffected < 4.15
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/c18f4ce9e2cb8836c302ef30a1e3392a0233c7b3 (opens in a new tab)
- https://git.kernel.org/stable/c/e0d4a17afde5aa0045dc3e1d66c6bb80927bad8c (opens in a new tab)
- https://git.kernel.org/stable/c/ed1d6e3d735e7b03f43a02f4306c89eb7663da14 (opens in a new tab)
- https://git.kernel.org/stable/c/f01e6a35c440b62f060e21f36b385e574a7f308c (opens in a new tab)
- https://git.kernel.org/stable/c/d6c0af293129345a17dc31c9b4179dc7f3d6af7a (opens in a new tab)
- https://git.kernel.org/stable/c/3c8b26ebf525ba5960510f48c6e9936a79ebe76f (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-2026-76312 (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-2026-80989)Record last updated .