CVE-2021-47459
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)
can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv
In the Linux kernel, the following vulnerability has been resolved: can: j1939: j1939_netdev_start(): fix UAF for rx_kref of j1939_priv It will trigger UAF for rx_kref of j1939_priv as following. cpu0 cpu1 j1939_sk_bind(socket0, ndev0, ...) j1939_netdev_start j1939_sk_bind(socket1, ndev0, ...) j1939_netdev_start j1939_priv_set j1939_priv_get_by_ndev_locked j1939_jsk_add ..... j1939_netdev_stop kref_put_lock(&priv->rx_kref, ...) kref_get(&priv->rx_kref, ...) REFCOUNT_WARN("addition on 0;...") ==================================================== refcount_t: addition on 0; use-after-free. WARNING: CPU: 1 PID: 20874 at lib/refcount.c:25 refcount_warn_saturate+0x169/0x1e0 RIP: 0010:refcount_warn_saturate+0x169/0x1e0 Call Trace: j1939_netdev_start+0x68b/0x920 j1939_sk_bind+0x426/0xeb0 ? security_socket_bind+0x83/0xb0 The rx_kref's kref_get() and kref_put() should use j1939_netdev_lock to protect.
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) |
|---|---|---|---|---|---|
| 9d71dd0c70099914fcd063135da3c580865e924c | affected | git | a0e47d2833b4f65e6c799f28c6b636d36b8b936d | Unavailable | None listed |
| 9d71dd0c70099914fcd063135da3c580865e924c | affected | git | 864e77771a24c877aaf53aee019f78619cbcd668 | Unavailable | None listed |
| 9d71dd0c70099914fcd063135da3c580865e924c | affected | git | 6e8811707e2df0c6ba920f0cad3a3bca7b42132f | Unavailable | None listed |
| 9d71dd0c70099914fcd063135da3c580865e924c | affected | git | d9d52a3ebd284882f5562c88e55991add5d01586 | 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) |
|---|---|---|---|---|---|
| 5.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.4 | Unavailable | None listed |
| 5.4.156 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.76 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.14.15 | unaffected | semver | Unavailable | 5.14.* | None listed |
| 5.15 | unaffected | original_commit_for_fix | Unavailable | * | None listed |