CVE-2024-46682nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: nfsd: prevent panic for nfsv4.0 closed files in nfs4_show_open Prior to commit 3f29cc82a84c ("nfsd: split sc_status out of sc_type") states_show() relied on sc_type field to be of valid type before calling into a subfunction to show content of a particular stateid. From that commit, we split the validity of the stateid into sc_status and no longer changed sc_type to 0 while unhashing the stateid. This resulted in kernel oopsing for nfsv4.0 opens that stay around and in nfs4_show_open() would derefence sc_file which was NULL. Instead, for closed open stateids forgo displaying information that relies of having a valid sc_file. To reproduce: mount the server with 4.0, read and close a file and then on the server cat /proc/fs/nfsd/clients/2/states [ 513.590804] Call trace: [ 513.590925] _raw_spin_lock+0xcc/0x160 [ 513.591119] nfs4_show_open+0x78/0x2c0 [nfsd] [ 513.591412] states_show+0x44c/0x488 [nfsd] [ 513.591681] seq_read_iter+0x5d8/0x760 [ 513.591896] seq_read+0x188/0x208 [ 513.592075] vfs_read+0x148/0x470 [ 513.592241] ksys_read+0xcc/0x178
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 21, 2026
- First seen by InfoSec Signals
- Oct 21, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3f29cc82a84c23cfd12b903029dd26002ca825f5 before ba0b697de298285301c71c258598226e06494236; from 3f29cc82a84c23cfd12b903029dd26002ca825f5 before a204501e1743d695ca2930ed25a2be9f8ced96d3; 172d038b7c4d3cfa9fc5ac210577c5c4f8256320; from 6.6.160 before 6.7 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.9 before 6.10.8; 6.11; 6.11; 6.11; 6.11; 6.11 | NVD |
References
- https://git.kernel.org/stable/c/ba0b697de298285301c71c258598226e06494236patch
- https://git.kernel.org/stable/c/a204501e1743d695ca2930ed25a2be9f8ced96d3patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.