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CVE Record

CVE-2022-50066: net: atlantic: fix aq_vec index out of range error

In the Linux kernel, the following vulnerability has been resolved: net: atlantic: fix aq_vec index out of range error The final update statement of the for loop exceeds the array range, the dereference of self->aq_vec[i] is not checked and then leads to the index out of range error. Also fixed this kind of coding style in other for loop. [ 97.937604] UBSAN: array-index-out-of-bounds in drivers/net/ethernet/aquantia/atlantic/aq_nic.c:1404:48 [ 97.937607] index 8 is out of range for type 'aq_vec_s *[8]' [ 97.937608] CPU: 38 PID: 3767 Comm: kworker/u256:18 Not tainted 5.19.0+ #2 [ 97.937610] Hardware name: Dell Inc. Precision 7865 Tower/, BIOS 1.0.0 06/12/2022 [ 97.937611] Workqueue: events_unbound async_run_entry_fn [ 97.937616] Call Trace: [ 97.937617] <TASK> [ 97.937619] dump_stack_lvl+0x49/0x63 [ 97.937624] dump_stack+0x10/0x16 [ 97.937626] ubsan_epilogue+0x9/0x3f [ 97.937627] __ubsan_handle_out_of_bounds.cold+0x44/0x49 [ 97.937629] ? __scm_send+0x348/0x440 [ 97.937632] ? aq_vec_stop+0x72/0x80 [atlantic] [ 97.937639] aq_nic_stop+0x1b6/0x1c0 [atlantic] [ 97.937644] aq_suspend_common+0x88/0x90 [atlantic] [ 97.937648] aq_pm_suspend_poweroff+0xe/0x20 [atlantic] [ 97.937653] pci_pm_suspend+0x7e/0x1a0 [ 97.937655] ? pci_pm_suspend_noirq+0x2b0/0x2b0 [ 97.937657] dpm_run_callback+0x54/0x190 [ 97.937660] __device_suspend+0x14c/0x4d0 [ 97.937661] async_suspend+0x23/0x70 [ 97.937663] async_run_entry_fn+0x33/0x120 [ 97.937664] process_one_work+0x21f/0x3f0 [ 97.937666] worker_thread+0x4a/0x3c0 [ 97.937668] ? process_one_work+0x3f0/0x3f0 [ 97.937669] kthread+0xf0/0x120 [ 97.937671] ? kthread_complete_and_exit+0x20/0x20 [ 97.937672] ret_from_fork+0x22/0x30 [ 97.937676] </TASK> v2. fixed "warning: variable 'aq_vec' set but not used" v3. simplified a for loop

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This is a Linux kernel driver bug in the Aquantia/Atlantic Ethernet driver. During device suspend or poweroff handling, the driver can read past the end of an internal array. The public record does not provide CVSS, impact scope, or confirmed exploitation.

Executive priority

Treat as targeted kernel maintenance, not an emergency based on available evidence. Prioritize patching where affected Atlantic adapters exist in production or high-availability systems.

Technical view

The atlantic driver can dereference self->aq_vec[i] after a loop update moves i beyond aq_vec_s *[8]. The provided trace shows UBSAN array-index-out-of-bounds in aq_nic.c during aq_nic_stop, aq_suspend_common, and PCI suspend handling.

Likely exposure

Exposure appears limited to Linux systems using the atlantic Ethernet driver and affected kernel ranges identified by the CVE record. Systems without Aquantia/Atlantic hardware or the driver are less likely to be exposed.

Exploitation context

The source bundle marks KEV as false and provides no evidence of active exploitation. The trace indicates a suspend or poweroff path, but the sources do not establish remote exploitability or privilege requirements.

Researcher notes

Evidence is strong for the root cause and fixed code path, but incomplete for severity, exploitability, and business impact. Avoid assuming remote compromise; validate driver presence and fixed commit coverage.

Mitigation direction

  • Update to a Linux kernel or vendor package containing the referenced stable fixes.
  • Check distribution or device vendor guidance for backported fixes.
  • Prioritize systems using Aquantia/Atlantic Ethernet adapters.
  • If patching is delayed, assess whether the atlantic driver is operationally required.

Validation and detection

  • Inventory Linux kernel versions against the affected ranges in the CVE record.
  • Confirm whether Aquantia/Atlantic Ethernet hardware or atlantic driver is present.
  • Review kernel logs for UBSAN out-of-bounds traces mentioning aq_nic.c or aq_vec.
  • Verify the installed kernel includes one of the referenced stable commits or vendor backport.
Prepared
Confidence
medium
Sources
6

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2022-50066 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
3Timeline events
0ADP providers
5Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux97bde5c4f909a55ab4c36cf0ac9094f6c9e4cdf6, 97bde5c4f909a55ab4c36cf0ac9094f6c9e4cdf6, 97bde5c4f909a55ab4c36cf0ac9094f6c9e4cdf6, 97bde5c4f909a55ab4c36cf0ac9094f6c9e4cdf6unaffected
LinuxLinux4.11, 0, 5.10.138, 5.15.63, 5.19.4, 6.0affected
Weakness

CWE details

No CWE listed

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