# CVE-2024-46682: linux: In the Linux kernel, the following vulnerability has been resolved:  nfsd: prevent panic for nfsv4.0 closed files in...

CVE-2024-46682 is fixed in linux on 1 platform, first by DEBIAN-CVE-2024-46682, released September 13, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-46682
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0022
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 13, 2024

## Description

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

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 13.5 (trixie) | 6.10.9-1 | [DEBIAN-CVE-2024-46682](https://patchblox.com/security/data/fix/linux/debian-cve-2024-46682.md) | Sep 13, 2024 |
| Linux | linux Debian 14 | 6.10.9-1 | [DEBIAN-CVE-2024-46682](https://patchblox.com/security/data/fix/linux/debian-cve-2024-46682.md) | Sep 13, 2024 |

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