{"id":"DEBIAN-CVE-2022-50002","details":"In the Linux kernel, the following vulnerability has been resolved:  net/mlx5: LAG, fix logic over MLX5_LAG_FLAG_NDEVS_READY  Only set MLX5_LAG_FLAG_NDEVS_READY if both netdevices are registered. Doing so guarantees that both ldev-\u003epf[MLX5_LAG_P0].dev and ldev-\u003epf[MLX5_LAG_P1].dev have valid pointers when MLX5_LAG_FLAG_NDEVS_READY is set.  The core issue is asymmetry in setting MLX5_LAG_FLAG_NDEVS_READY and clearing it. Setting it is done wrongly when both ldev-\u003epf[MLX5_LAG_P0].dev and ldev-\u003epf[MLX5_LAG_P1].dev are set; clearing it is done right when either of ldev-\u003epf[i].netdev is cleared.  Consider the following scenario: 1. PF0 loads and sets ldev-\u003epf[MLX5_LAG_P0].dev to a valid pointer 2. PF1 loads and sets both ldev-\u003epf[MLX5_LAG_P1].dev and    ldev-\u003epf[MLX5_LAG_P1].netdev with valid pointers. This results in    MLX5_LAG_FLAG_NDEVS_READY is set. 3. PF0 is unloaded before setting dev-\u003epf[MLX5_LAG_P0].netdev.    MLX5_LAG_FLAG_NDEVS_READY remains set.  Further execution of mlx5_do_bond() will result in null pointer dereference when calling mlx5_lag_is_multipath()  This patch fixes the following call trace actually encountered:  [ 1293.475195] BUG: kernel NULL pointer dereference, address: 00000000000009a8 [ 1293.478756] #PF: supervisor read access in kernel mode [ 1293.481320] #PF: error_code(0x0000) - not-present page [ 1293.483686] PGD 0 P4D 0 [ 1293.484434] Oops: 0000 [#1] SMP PTI [ 1293.485377] CPU: 1 PID: 23690 Comm: kworker/u16:2 Not tainted 5.18.0-rc5_for_upstream_min_debug_2022_05_05_10_13 #1 [ 1293.488039] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014 [ 1293.490836] Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core] [ 1293.492448] RIP: 0010:mlx5_lag_is_multipath+0x5/0x50 [mlx5_core] [ 1293.494044] Code: e8 70 40 ff e0 48 8b 14 24 48 83 05 5c 1a 1b 00 01 e9 19 ff ff ff 48 83 05 47 1a 1b 00 01 eb d7 0f 1f 44 00 00 0f 1f 44 00 00 \u003c48\u003e 8b 87 a8 09 00 00 48 85 c0 74 26 48 83 05 a7 1b 1b 00 01 41 b8 [ 1293.498673] RSP: 0018:ffff88811b2fbe40 EFLAGS: 00010202 [ 1293.500152] RAX: ffff88818a94e1c0 RBX: ffff888165eca6c0 RCX: 0000000000000000 [ 1293.501841] RDX: 0000000000000001 RSI: ffff88818a94e1c0 RDI: 0000000000000000 [ 1293.503585] RBP: 0000000000000000 R08: ffff888119886740 R09: ffff888165eca73c [ 1293.505286] R10: 0000000000000018 R11: 0000000000000018 R12: ffff88818a94e1c0 [ 1293.506979] R13: ffff888112729800 R14: 0000000000000000 R15: ffff888112729858 [ 1293.508753] FS:  0000000000000000(0000) GS:ffff88852cc40000(0000) knlGS:0000000000000000 [ 1293.510782] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1293.512265] CR2: 00000000000009a8 CR3: 00000001032d4002 CR4: 0000000000370ea0 [ 1293.514001] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1293.515806] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400","modified":"2026-09-01T20:04:57.240661499Z","published":"2025-06-18T11:15:28.063Z","upstream":["CVE-2022-50002"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50002"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50002.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50002.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.2-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50002.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"}]}