High 7.5Published Aug 22, 2026

CVE-2026-74717net/mlx5: fw_tracer, return NULL on create error

Updated under an hour ago (2026-10-19 07:23 UTC)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: fw_tracer, return NULL on create error Tracer creation can fail by returning either NULL or ERR_PTR. The return value is stored without a check on the device, and users treat ERR_PTR and NULL the same way. This also causes a crash in the core dump logic, which is missing the ERR_PTR check and ends up dereferencing it, as shown in the trace below. Switch tracer creation to return NULL on failure only, so callers only need a single NULL check. Internal error: Oops: 0000000096000006 [#1] SMP Modules linked in: mlx5_ib ib_uverbs ib_core ipv6 mlx5_core CPU: 1 UID: 0 PID: 12 Comm: kworker/u16:0 Not tainted 6.19.7 #1 PREEMPT(none) Workqueue: mlx5_health0001:01:00.0 mlx5_fw_reporter_err_work [mlx5_core] pstate: a3400009 (NzCv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : mlx5_fw_tracer_trigger_core_dump_general+0x58/0xe0 [mlx5_core] lr : mlx5_fw_tracer_trigger_core_dump_general+0x40/0xe0 [mlx5_core] sp : ffff800081cf3c40 x29: ffff800081cf3c90 x28: 0000000000000000 x27: 0000000000000000 x26: ffff000080018828 x25: 0000000000000000 x24: ffff000080304a05 x23: ffff800081cf3d80 x22: ffff0000847e01a0 x21: 0000000000000000 x20: ffff0000847e01a0 x19: ffffffffffffffa1 x18: ffff80008310bbf0 x17: ffff800080119650 x16: ffff80008010df54 x15: ffff80008010d4ac x14: ffff800079c202e4 x13: ffff80008002fe60 x12: ffff800080119650 x11: ffff80008010df54 x10: ffff80008010d4ac x9 : ffff800079c203d8 x8 : ffff800081cf3c88 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000008 x3 : 0000000000000030 x2 : 0000000000000008 x1 : 0000000000000000 x0 : 00000000c5c4000e Call trace: mlx5_fw_tracer_trigger_core_dump_general+0x58/0xe0 [mlx5_core] (P) mlx5_fw_reporter_dump+0x30/0x2e0 [mlx5_core] devlink_health_do_dump+0x9c/0x160 devlink_health_report+0x1c0/0x288 mlx5_fw_reporter_err_work+0xac/0xc0 [mlx5_core] process_one_work+0x15c/0x3d8 worker_thread+0x18c/0x320 kthread+0x148/0x228 ret_from_fork+0x10/0x20 Code: b9400000 5ac00800 7a401800 540003ca (3940a260) ---[ end trace 0000000000000000 ]--- Kernel panic - not syncing: Oops: Fatal exception SMP: stopping secondary CPUs Kernel Offset: disabled CPU features: 0x000000,00078031,75fce5a1,35fffe67 Memory Limit: none ---[ end Kernel panic - not syncing: Oops: Fatal exception ]---

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from fd1483fe1f9fd45fe312adffb0faffa57446690d before 47fe0d2571e5b446a0f0b0c1d6b99f55e51f5cc0; from fd1483fe1f9fd45fe312adffb0faffa57446690d before ee41ea49c4ab0e4015919f52ad23ec251d3b39d3; from fd1483fe1f9fd45fe312adffb0faffa57446690d before 04599570c3a18f9ae7aad36825eb46f3dcd2c4e3; from fd1483fe1f9fd45fe312adffb0faffa57446690d before 9a416f000285a94c1b723877547981dec8132434; from fd1483fe1f9fd45fe312adffb0faffa57446690d before b1d6375b9a63c9dc7e5e780d3ea9b126fe30d6cb; from fd1483fe1f9fd45fe312adffb0faffa57446690d before 80094352bd40ba54a33731f9c22872493983ed6d; from fd1483fe1f9fd45fe312adffb0faffa57446690d before 4aafa600d93e9551c1f24e785d57cbd4adf021d5; from fd1483fe1f9fd45fe312adffb0faffa57446690d before af39eb111ce6b5eba9c08513b62c4868eb7e7fd5	CNA record

References

https://git.kernel.org/stable/c/47fe0d2571e5b446a0f0b0c1d6b99f55e51f5cc0
https://git.kernel.org/stable/c/ee41ea49c4ab0e4015919f52ad23ec251d3b39d3
https://git.kernel.org/stable/c/04599570c3a18f9ae7aad36825eb46f3dcd2c4e3
https://git.kernel.org/stable/c/9a416f000285a94c1b723877547981dec8132434
https://git.kernel.org/stable/c/b1d6375b9a63c9dc7e5e780d3ea9b126fe30d6cb
https://git.kernel.org/stable/c/80094352bd40ba54a33731f9c22872493983ed6d
https://git.kernel.org/stable/c/4aafa600d93e9551c1f24e785d57cbd4adf021d5
https://git.kernel.org/stable/c/af39eb111ce6b5eba9c08513b62c4868eb7e7fd5

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.