CVE-2021-47507
- Source
- https://cve.org/CVERecord?id=CVE-2021-47507
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47507.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47507
- Downstream
- Related
- Published
- 2024-05-24T15:15:11Z
- Modified
- 2026-03-14T11:19:12Z
- Severity
-
- 4.7 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
nfsd: Fix nsfd startup race (again)
Commit bd5ae9288d64 ("nfsd: register pernet ops last, unregister first") has re-opened rpc_pipefs_event() race against nfsd_net_id registration (register_pernet_subsys()) which has been fixed by commit bb7ffbf29e76 ("nfsd: fix nsfd startup race triggering BUG_ON").
Restore the order of register_pernet_subsys() vs register_cld_notifier(). Add WARN_ON() to prevent a future regression.
Crash info: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000012 CPU: 8 PID: 345 Comm: mount Not tainted 5.4.144-... #1 pc : rpc_pipefs_event+0x54/0x120 [nfsd] lr : rpc_pipefs_event+0x48/0x120 [nfsd] Call trace: rpc_pipefs_event+0x54/0x120 [nfsd] blocking_notifier_call_chain rpc_fill_super get_tree_keyed rpc_fs_get_tree vfs_get_tree do_mount ksys_mount __arm64_sys_mount el0_svc_handler el0_svc
- References
Affected packages
Git /
Database specific
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47507.json"
unresolved_ranges
[
{
"events": [
{
"introduced": "5.4.102"
},
{
"fixed": "5.4.165"
}
]
},
{
"events": [
{
"introduced": "5.10.20"
},
{
"fixed": "5.10.85"
}
]
},
{
"events": [
{
"introduced": "5.11.3"
},
{
"fixed": "5.15.8"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc1"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc2"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc3"
}
]
},
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "5.16-rc4"
}
]
}
]