{"id":"DEBIAN-CVE-2022-49456","details":"In the Linux kernel, the following vulnerability has been resolved:  bonding: fix missed rcu protection  When removing the rcu_read_lock in bond_ethtool_get_ts_info() as discussed [1], I didn't notice it could be called via setsockopt, which doesn't hold rcu lock, as syzbot pointed:    stack backtrace:   CPU: 0 PID: 3599 Comm: syz-executor317 Not tainted 5.18.0-rc5-syzkaller-01392-g01f4685797a5 #0   Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011   Call Trace:    \u003cTASK\u003e    __dump_stack lib/dump_stack.c:88 [inline]    dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106    bond_option_active_slave_get_rcu include/net/bonding.h:353 [inline]    bond_ethtool_get_ts_info+0x32c/0x3a0 drivers/net/bonding/bond_main.c:5595    __ethtool_get_ts_info+0x173/0x240 net/ethtool/common.c:554    ethtool_get_phc_vclocks+0x99/0x110 net/ethtool/common.c:568    sock_timestamping_bind_phc net/core/sock.c:869 [inline]    sock_set_timestamping+0x3a3/0x7e0 net/core/sock.c:916    sock_setsockopt+0x543/0x2ec0 net/core/sock.c:1221    __sys_setsockopt+0x55e/0x6a0 net/socket.c:2223    __do_sys_setsockopt net/socket.c:2238 [inline]    __se_sys_setsockopt net/socket.c:2235 [inline]    __x64_sys_setsockopt+0xba/0x150 net/socket.c:2235    do_syscall_x64 arch/x86/entry/common.c:50 [inline]    do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80    entry_SYSCALL_64_after_hwframe+0x44/0xae   RIP: 0033:0x7f8902c8eb39  Fix it by adding rcu_read_lock and take a ref on the real_dev. Since dev_hold() and dev_put() can take NULL these days, we can skip checking if real_dev exist.  [1] https://lore.kernel.org/netdev/27565.1642742439@famine/","modified":"2026-09-01T20:04:55.076595522Z","published":"2025-02-26T07:01:21.950Z","upstream":["CVE-2022-49456"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49456"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49456.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49456.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.18.5-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49456.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}