Executive Summary

Informations
Name CVE-2024-46682 First vendor Publication 2024-09-13
Vendor Cve Last vendor Modification 2024-09-13

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Overall CVSS Score 5.5
Base Score 5.5 Environmental Score 5.5
impact SubScore 3.6 Temporal Score 5.5
Exploitabality Sub Score 1.8
 
Attack Vector Local Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact None
Integrity Impact None Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector :
Cvss Base Score N/A Attack Range N/A
Cvss Impact Score N/A Attack Complexity N/A
Cvss Expoit Score N/A Authentication N/A
Calculate full CVSS 2.0 Vectors scores

Detail

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

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-46682

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-476 NULL Pointer Dereference

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 8
Os 3604

Sources (Detail)

https://git.kernel.org/stable/c/a204501e1743d695ca2930ed25a2be9f8ced96d3
https://git.kernel.org/stable/c/ba0b697de298285301c71c258598226e06494236
Source Url

Alert History

If you want to see full details history, please login or register.
0
1
2
3
4
5
6
Date Informations
2024-10-03 02:53:42
  • Multiple Updates
2024-10-02 02:52:05
  • Multiple Updates
2024-09-14 21:29:41
  • Multiple Updates
2024-09-14 02:48:02
  • Multiple Updates
2024-09-14 02:47:03
  • Multiple Updates
2024-09-13 21:27:36
  • Multiple Updates
2024-09-13 13:27:27
  • First insertion