net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list
Summary
| CVE | CVE-2026-53230 |
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| State | PUBLISHED |
|---|
| Assigner | Linux |
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| Source Priority | CVE Program / NVD first with legacy fallback |
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| Published | 2026-06-25 09:16:40 UTC |
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| Updated | 2026-06-25 09:16:40 UTC |
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| Description | In the Linux kernel, the following vulnerability has been resolved:
net/mlx5: Fix slab-out-of-bounds in mlx5_query_nic_vport_mac_list
mlx5_query_nic_vport_mac_list() sizes its firmware command buffer using
the PF's log_max_current_uc/mc_list capabilities. When querying a VF
vport with a larger configured max (via devlink), the firmware response
can overflow this buffer:
BUG: KASAN: slab-out-of-bounds in mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]
Read of size 4 at addr ff1100013ffc8a12 by task kworker/u96:2/385
CPU: 12 UID: 0 PID: 385 Comm: kworker/u96:2 Not tainted 7.0.0-rc6+ #1 PREEMPT
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009)
Workqueue: mlx5_esw_wq esw_vport_change_handler [mlx5_core]
Call Trace:
<TASK>
dump_stack_lvl+0x69/0xa0
print_report+0x176/0x4e4
kasan_report+0xc8/0x100
mlx5_query_nic_vport_mac_list+0x453/0x4c0 [mlx5_core]
esw_update_vport_addr_list+0x2e3/0xda0 [mlx5_core]
esw_vport_change_handle_locked+0xa1f/0x1060 [mlx5_core]
esw_vport_change_handler+0x6a/0x90 [mlx5_core]
process_one_work+0x87f/0x15e0
worker_thread+0x62b/0x1020
kthread+0x375/0x490
ret_from_fork+0x4dc/0x810
ret_from_fork_asm+0x11/0x20
</TASK>
Fix by querying the vport's own HCA caps to size the buffer correctly.
Refactor the function to allocate and return the MAC list internally,
removing the caller's dependency on knowing the correct max. |
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Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|
| CNA |
Linux |
Linux |
affected e16aea2744abea612c27ee0eef606c6a6a8204de 41781f2789309462520a93822e946521ed78f97f git |
Not specified |
| CNA |
Linux |
Linux |
affected e16aea2744abea612c27ee0eef606c6a6a8204de 537d87784e81c3d7037525b99416455cee088cdc git |
Not specified |
| CNA |
Linux |
Linux |
affected e16aea2744abea612c27ee0eef606c6a6a8204de 0f807764bb122fd63aa45f4229cb1ef2679fbd40 git |
Not specified |
| CNA |
Linux |
Linux |
affected e16aea2744abea612c27ee0eef606c6a6a8204de 2398e497389ed4be43f7cfbab499b49cec7dae1a git |
Not specified |
| CNA |
Linux |
Linux |
affected e16aea2744abea612c27ee0eef606c6a6a8204de 894e036a24a26a6dd7b17d8d3fb5c53ab48a6074 git |
Not specified |
| CNA |
Linux |
Linux |
affected 4.5 |
Not specified |
| CNA |
Linux |
Linux |
unaffected 4.5 semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.6.143 6.6.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.12.94 6.12.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 6.18.36 6.18.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.0.13 7.0.* semver |
Not specified |
| CNA |
Linux |
Linux |
unaffected 7.1 * original_commit_for_fix |
Not specified |
References
| Reference | Source | Link | Tags |
|---|
| git.kernel.org/stable/c/894e036a24a26a6dd7b17d8d3fb5c53ab48a6074 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/41781f2789309462520a93822e946521ed78f97f |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/537d87784e81c3d7037525b99416455cee088cdc |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/0f807764bb122fd63aa45f4229cb1ef2679fbd40 |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| git.kernel.org/stable/c/2398e497389ed4be43f7cfbab499b49cec7dae1a |
416baaa9-dc9f-4396-8d5f-8c081fb06d67 |
git.kernel.org |
|
| CVE Program record |
CVE.ORG |
www.cve.org |
canonical |
| NVD vulnerability detail |
NVD |
nvd.nist.gov |
canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.
