CVE-2021-46952
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: fs_context: validate UDP retrans to prevent shift out-of-bounds
In the Linux kernel, the following vulnerability has been resolved: NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds Fix shift out-of-bounds in xprt_calc_majortimeo(). This is caused by a garbage timeout (retrans) mount option being passed to nfs mount, in this case from syzkaller. If the protocol is XPRT_TRANSPORT_UDP, then 'retrans' is a shift value for a 64-bit long integer, so 'retrans' cannot be >= 64. If it is >= 64, fail the mount and return an error.
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) |
|---|---|---|---|---|---|
| 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 | affected | git | 96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2 | Unavailable | None listed |
| 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 | affected | git | 2f3380121d49e829fb73ba86240c181bc32ad897 | Unavailable | None listed |
| 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 | affected | git | 3d0163821c035040a46d816a42c0780f0f0a30a8 | Unavailable | None listed |
| 9954bf92c0cddd50a2a470be302e1c1ffdf21d42 | affected | git | c09f11ef35955785f92369e25819bf0629df2e59 | 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) |
|---|---|---|---|---|---|
| 5.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.6 | Unavailable | None listed |
| 5.10.36 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.11.20 | unaffected | semver | Unavailable | 5.11.* | None listed |
| 5.12.3 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |