CVE-2021-47259
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)
NFS: Fix use-after-free in nfs4_init_client()
In the Linux kernel, the following vulnerability has been resolved: NFS: Fix use-after-free in nfs4_init_client() KASAN reports a use-after-free when attempting to mount two different exports through two different NICs that belong to the same server. Olga was able to hit this with kernels starting somewhere between 5.7 and 5.10, but I traced the patch that introduced the clear_bit() call to 4.13. So something must have changed in the refcounting of the clp pointer to make this call to nfs_put_client() the very last one.
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) |
|---|---|---|---|---|---|
| 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da | affected | git | c7eab9e2d7b4e983ce280276fb920af649955897 | Unavailable | None listed |
| 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da | affected | git | 42c10b0db064e45f5c5ae7019bbf2168ffab766c | Unavailable | None listed |
| 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da | affected | git | 3e3c7ebbfac152d08be75c92802a64a1f6471a15 | Unavailable | None listed |
| 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da | affected | git | c3b6cf64dfe4ef96e7341508d50d6998da7062c7 | Unavailable | None listed |
| 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da | affected | git | 72651c6579a25317a90536181d311c663d0329ab | Unavailable | None listed |
| 8dcbec6d20eb881ba368d0aebc3a8a678aebb1da | affected | git | 476bdb04c501fc64bf3b8464ffddefc8dbe01577 | 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) |
|---|---|---|---|---|---|
| 4.13 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.13 | Unavailable | None listed |
| 4.14.237 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.195 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.126 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.44 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.12.11 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |