CVE-2021-47507
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
nfsd: Fix nsfd startup race (again)
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
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 8677e99150b0830d29cc1318b4cc559e176940bb | affected | git | f5734b1714ca355703e9ea8fb61d04beff1790b9 | Unavailable | None listed |
| 7c7cb07d4affcf41749234fe9dc4d90cd3959e32 | affected | git | c520943a00ad5015704969ad3304c956bcd49d25 | Unavailable | None listed |
| bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 | affected | git | 8bf902fee5893cfc2f04a698abab47629699ae9a | Unavailable | None listed |
| bd5ae9288d6451bd346a1b4a59d4fe7e62ba29b7 | affected | git | b10252c7ae9c9d7c90552f88b544a44ee773af64 | Unavailable | None listed |
| 4d41f65efeec0a6da6088341203c81e49ebfcd90 | affected | git | Unavailable | Unavailable | None listed |
| 5.4.102 | affected | semver | 5.4.165 | Unavailable | None listed |
| 5.10.20 | affected | semver | 5.10.85 | Unavailable | None listed |
| 5.11.3 | affected | semver | 5.12 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.12 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.12 | Unavailable | None listed |
| 5.4.165 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.85 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.8 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.16 | unaffected | original_commit_for_fix | Unavailable | * | None listed |