Name | CVE-2021-47459 |
Description | 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. |
Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
Source Package | Release | Version | Status |
---|---|---|---|
linux (PTS) | jessie, jessie (lts) | 3.16.84-1 | vulnerable |
stretch (security) | 4.9.320-2 | vulnerable | |
stretch (lts), stretch | 4.9.320-3 | vulnerable | |
buster (security), buster, buster (lts) | 4.19.316-1 | fixed | |
bullseye (security), bullseye | 5.10.223-1 | fixed | |
bookworm | 6.1.106-3 | fixed | |
bookworm (security) | 6.1.99-1 | fixed | |
trixie | 6.10.6-1 | fixed | |
sid | 6.10.7-1 | fixed |
The information below is based on the following data on fixed versions.
Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
---|---|---|---|---|---|---|
linux | source | jessie | (unfixed) | end-of-life | ||
linux | source | stretch | (unfixed) | end-of-life | ||
linux | source | buster | (not affected) | |||
linux | source | bullseye | 5.10.84-1 | |||
linux | source | (unstable) | 5.14.16-1 |
[buster] - linux <not-affected> (Vulnerable code not present)
https://git.kernel.org/linus/d9d52a3ebd284882f5562c88e55991add5d01586 (5.15-rc7)