CVE-2024-47692

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Source
https://cve.org/CVERecord?id=CVE-2024-47692
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-47692.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-47692
Downstream
Related
Published
2024-10-21T11:53:31.238Z
Modified
2026-03-20T12:38:04.001891Z
Summary
nfsd: return -EINVAL when namelen is 0
Details

In the Linux kernel, the following vulnerability has been resolved:

nfsd: return -EINVAL when namelen is 0

When we have a corrupted main.sqlite in /var/lib/nfs/nfsdcld/, it may result in namelen being 0, which will cause memdupuser() to return ZEROSIZEPTR. When we access the name.data that has been assigned the value of ZEROSIZEPTR in nfs4clienttoreclaim(), null pointer dereference is triggered.

[ T1205] ================================================================== [ T1205] BUG: KASAN: null-ptr-deref in nfs4clienttoreclaim+0xe9/0x260 [ T1205] Read of size 1 at addr 0000000000000010 by task nfsdcld/1205 [ T1205] [ T1205] CPU: 11 PID: 1205 Comm: nfsdcld Not tainted 5.10.0-00003-g2c1423731b8d #406 [ T1205] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS ?-20190727073836-buildvm-ppc64le-16.ppc.fedoraproject.org-3.fc31 04/01/2014 [ T1205] Call Trace: [ T1205] dumpstack+0x9a/0xd0 [ T1205] ? nfs4clienttoreclaim+0xe9/0x260 [ T1205] __kasanreport.cold+0x34/0x84 [ T1205] ? nfs4clienttoreclaim+0xe9/0x260 [ T1205] kasanreport+0x3a/0x50 [ T1205] nfs4clienttoreclaim+0xe9/0x260 [ T1205] ? nfsd4releaselockowner+0x410/0x410 [ T1205] cldpipedowncall+0x5ca/0x760 [ T1205] ? nfsd4cldtrackingexit+0x1d0/0x1d0 [ T1205] ? downwritekillablenested+0x170/0x170 [ T1205] ? avcpolicyseqno+0x28/0x40 [ T1205] ? selinuxfilepermission+0x1b4/0x1e0 [ T1205] rpcpipewrite+0x84/0xb0 [ T1205] vfswrite+0x143/0x520 [ T1205] ksyswrite+0xc9/0x170 [ T1205] ? _ia32sysread+0x50/0x50 [ T1205] ? ktimegetcoarserealts64+0xfe/0x110 [ T1205] ? ktimegetcoarserealts64+0xa2/0x110 [ T1205] dosyscall64+0x33/0x40 [ T1205] entrySYSCALL64afterhwframe+0x67/0xd1 [ T1205] RIP: 0033:0x7fdbdb761bc7 [ T1205] Code: 0f 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b7 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 514 [ T1205] RSP: 002b:00007fff8c4b7248 EFLAGS: 00000246 ORIGRAX: 0000000000000001 [ T1205] RAX: ffffffffffffffda RBX: 000000000000042b RCX: 00007fdbdb761bc7 [ T1205] RDX: 000000000000042b RSI: 00007fff8c4b75f0 RDI: 0000000000000008 [ T1205] RBP: 00007fdbdb761bb0 R08: 0000000000000000 R09: 0000000000000001 [ T1205] R10: 0000000000000000 R11: 0000000000000246 R12: 000000000000042b [ T1205] R13: 0000000000000008 R14: 00007fff8c4b75f0 R15: 0000000000000000 [ T1205] ==================================================================

Fix it by checking namelen.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/47xxx/CVE-2024-47692.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
74725959c33c14114fdce1e36e3504d106584d53
Fixed
6d07040ae5c2214e39c7444d898039c9e655a79a
Fixed
0f1d007bbea38a61cf9c5392708dc70ae9d84a3d
Fixed
b7b7a8df41ef18862dd6b22289fb46c2c12398af
Fixed
84a563d136faf514fdad1ade28d7a142fd313cb8
Fixed
318f70857caab3da9a6ada9bc8c1f4f7591b695e
Fixed
766d5fbd78f7a52b3888449a0358760477b74602
Fixed
1ff8be8d008b9ddc8e7043fbddd37d5d451b271b
Fixed
22451a16b7ab7debefce660672566be887db1637

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-47692.json"