CVE-2026-98347IB/IPoIB: Avoid restoring OPER_UP after multicast flush
- —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: IB/IPoIB: Avoid restoring OPER_UP after multicast flush ipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to prevent multicast joins while ipoib_mcast_dev_flush() is running, and restores the flag afterwards if it was previously set. This restore races with ipoib_ib_dev_down(). If the interface is brought down while the flush is in progress, ipoib_ib_dev_down() clears IPOIB_FLAG_OPER_UP, but the flush path may set it again after the device has already gone down. Since commit 894021a75291 ("IB/ipoib: Make the carrier_on_task race aware"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP being cleared to terminate its rtnl_trylock() retry loop. If the flag is left set after shutdown, the workqueue retries forever, causing teardown to deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while holding RTNL. Instead of overloading IPOIB_FLAG_OPER_UP to block multicast joins during a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag. Use it together with IPOIB_FLAG_OPER_UP to determine whether multicast joins are allowed, avoiding the race with device shutdown.
Timeline
ID reserved
By Linux
- 11 days later
· 11 days later
Published
- 13 days later
· 13 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
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 (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < f973769fb7cb33ba0d4a64b7dcfee0cabaead938
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < b72f38929f4b5aa83161fd3b22a7327207e51ec5
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < 1b11e4b55b41d9e69a8e8d07622614202e2eaca9
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < 326f7d34bd7e64de535566b65c0533b640df5a81
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < 5ad925d45f28464a5e043c9620880bb6a030da89
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < 188b334a6db36a8e0bfaaf59bc4020639a0f3aad
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < 1ff3add37c329704ec46181b4ae4f00f9f16ce6f
- affected 344bacca8cd811809fc33a249f2738ab757d327f – < 9a141d3dc869d18b2eab35e999f4790a9b84e40f
- affected a289c65ca49d2680a3d797e633e57a45573d1df2
- affected b81459c78935e4579a577b2366c5f8878d3c7fee
- affected 8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5
- affected dfe809702a11bd7fb91c882fb55620e39ce22109
- affected 87160fb51bc343793cc8f5f031a87f1a35aecb82
- affected 749fd55dd210f9676f0d445a6efaaa3bec65174a
- affected 3.2.84 – < 3.3
- affected 3.10.105 – < 3.11
- affected 3.12.65 – < 3.13
- affected 3.16.39 – < 3.17
- affected 4.4.24 – < 4.5
- affected 4.7.7 – < 4.8
- affected 4.8
- unaffected < 4.8
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.54 – ≤ 6.18.*
- unaffected 7.2.8 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938 (opens in a new tab)
- https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5 (opens in a new tab)
- https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9 (opens in a new tab)
- https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81 (opens in a new tab)
- https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89 (opens in a new tab)
- https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad (opens in a new tab)
- https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f (opens in a new tab)
- https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f (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-2026-93332 (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-2026-98347)Record last updated .