CVE-2026-89798rpcrdma: arm rn_done before publishing the notification
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% 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: rpcrdma: arm rn_done before publishing the notification rpcrdma_rn_register() inserts @rn into rd_xa with xa_alloc() before storing the caller's callback in rn->rn_done. The xarray makes @rn reachable to rpcrdma_remove_one(), which walks rd_xa and invokes rn->rn_done(rn) for every registered notification. A device removal that races a fresh registration can therefore observe @rn with rn_done still NULL, because the notification objects are zero allocated by their owners, and call through a NULL function pointer. Store rn->rn_done before xa_alloc() publishes @rn. The xarray's store-side and load-side ordering then guarantees that any CPU which finds @rn in rd_xa also observes the armed callback. rpcrdma_rn_unregister() treats a non-NULL rn_done as the sentinel for a completed registration, so the early store must not survive a failed registration. Clear rn_done again when xa_alloc() fails. Were it left set, the failed-accept cleanup path would call rpcrdma_rn_unregister() on an @rn that was never inserted, erasing an unrelated rd_xa slot and underflowing rd_kref.
Timeline
ID reserved
By Linux
- 5 days later
· 5 days later
Published
- 33 days later
· 33 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)
- 0.21% · top 89% 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 7e86845a0346efc95fddaa97ce5cd6a8bda8c71c – < f9fe3cad43c42d874a388583552b39b411d886eb
- affected 7e86845a0346efc95fddaa97ce5cd6a8bda8c71c – < 3c97b8e76ca2bba9e8770571413aed694068e78e
- affected 7e86845a0346efc95fddaa97ce5cd6a8bda8c71c – < ea0408273ccf5df1fb52d9a1b9db4d31600dcb36
- affected 7e86845a0346efc95fddaa97ce5cd6a8bda8c71c – < 5b06f706374c37375bdff9d21cc10e61df925a92
- affected 6.11
- unaffected < 6.11
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.51 – ≤ 6.18.*
- unaffected 7.2.5 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References4
- https://git.kernel.org/stable/c/f9fe3cad43c42d874a388583552b39b411d886eb (opens in a new tab)
- https://git.kernel.org/stable/c/3c97b8e76ca2bba9e8770571413aed694068e78e (opens in a new tab)
- https://git.kernel.org/stable/c/ea0408273ccf5df1fb52d9a1b9db4d31600dcb36 (opens in a new tab)
- https://git.kernel.org/stable/c/5b06f706374c37375bdff9d21cc10e61df925a92 (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-2026-80398 (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-2026-89798)Record last updated .