CVE-2026-90104NFSv4.1: zero referring call lists before decoding
- 9.8CriticalCVSS base score
- 0.73%Exploitation in 30 daysEPSS · top 45% 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: NFSv4.1: zero referring call lists before decoding decode_cb_sequence_args() allocates csa_rclists with kmalloc_objs(), so each referring_call_list starts uninitialized. decode_rc_list() assigns rcl_refcalls only when rcl_nrefcalls is nonzero. A valid list with zero referring calls therefore leaves the pointer uninitialized, and nfs4_callback_sequence() later passes stale slab contents to kfree(). Allocate csa_rclists with kzalloc_objs() so every rcl_refcalls member is NULL from the beginning, including valid empty referring call lists.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 43 days later
· 43 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 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Received | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.73% · top 45% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 4aece6a19cf7f474f15eb861ba74db4479884ce3 – < 810f6b3a29ac96fdc16909132b31627dae6824c2
- affected 4aece6a19cf7f474f15eb861ba74db4479884ce3 – < ed54460caf5b5aa65ec03c9a6032d831f39f19f5
- affected 4aece6a19cf7f474f15eb861ba74db4479884ce3 – < 7510a5b9edec9d9536a4e69f10edfb2592e6cf7f
- affected 4aece6a19cf7f474f15eb861ba74db4479884ce3 – < f4d23937e1c41995c2f54af26c89b5e48a41c299
- affected 4aece6a19cf7f474f15eb861ba74db4479884ce3 – < f31f3c042e024aef437cda42f0424ae8d4594b6c
- affected 4aece6a19cf7f474f15eb861ba74db4479884ce3 – < 8fa4804fe62ca4155a2d8fc2789d630376cbf2fc
- affected 2.6.31
- unaffected < 2.6.31
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.2.6 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/810f6b3a29ac96fdc16909132b31627dae6824c2 (opens in a new tab)
- https://git.kernel.org/stable/c/ed54460caf5b5aa65ec03c9a6032d831f39f19f5 (opens in a new tab)
- https://git.kernel.org/stable/c/7510a5b9edec9d9536a4e69f10edfb2592e6cf7f (opens in a new tab)
- https://git.kernel.org/stable/c/f4d23937e1c41995c2f54af26c89b5e48a41c299 (opens in a new tab)
- https://git.kernel.org/stable/c/f31f3c042e024aef437cda42f0424ae8d4594b6c (opens in a new tab)
- https://git.kernel.org/stable/c/8fa4804fe62ca4155a2d8fc2789d630376cbf2fc (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-2026-81697 (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-2026-90104)Record last updated .