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CVE Record

CVE-2024-39502: ionic: fix use after netif_napi_del()

In the Linux kernel, the following vulnerability has been resolved: ionic: fix use after netif_napi_del() When queues are started, netif_napi_add() and napi_enable() are called. If there are 4 queues and only 3 queues are used for the current configuration, only 3 queues' napi should be registered and enabled. The ionic_qcq_enable() checks whether the .poll pointer is not NULL for enabling only the using queue' napi. Unused queues' napi will not be registered by netif_napi_add(), so the .poll pointer indicates NULL. But it couldn't distinguish whether the napi was unregistered or not because netif_napi_del() doesn't reset the .poll pointer to NULL. So, ionic_qcq_enable() calls napi_enable() for the queue, which was unregistered by netif_napi_del(). Reproducer: ethtool -L <interface name> rx 1 tx 1 combined 0 ethtool -L <interface name> rx 0 tx 0 combined 1 ethtool -L <interface name> rx 0 tx 0 combined 4 Splat looks like: kernel BUG at net/core/dev.c:6666! Oops: invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 3 PID: 1057 Comm: kworker/3:3 Not tainted 6.10.0-rc2+ #16 Workqueue: events ionic_lif_deferred_work [ionic] RIP: 0010:napi_enable+0x3b/0x40 Code: 48 89 c2 48 83 e2 f6 80 b9 61 09 00 00 00 74 0d 48 83 bf 60 01 00 00 00 74 03 80 ce 01 f0 4f RSP: 0018:ffffb6ed83227d48 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff97560cda0828 RCX: 0000000000000029 RDX: 0000000000000001 RSI: 0000000000000000 RDI: ffff97560cda0a28 RBP: ffffb6ed83227d50 R08: 0000000000000400 R09: 0000000000000001 R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000 R13: ffff97560ce3c1a0 R14: 0000000000000000 R15: ffff975613ba0a20 FS: 0000000000000000(0000) GS:ffff975d5f780000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8f734ee200 CR3: 0000000103e50000 CR4: 00000000007506f0 PKRU: 55555554 Call Trace: <TASK> ? die+0x33/0x90 ? do_trap+0xd9/0x100 ? napi_enable+0x3b/0x40 ? do_error_trap+0x83/0xb0 ? napi_enable+0x3b/0x40 ? napi_enable+0x3b/0x40 ? exc_invalid_op+0x4e/0x70 ? napi_enable+0x3b/0x40 ? asm_exc_invalid_op+0x16/0x20 ? napi_enable+0x3b/0x40 ionic_qcq_enable+0xb7/0x180 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8] ionic_start_queues+0xc4/0x290 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8] ionic_link_status_check+0x11c/0x170 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8] ionic_lif_deferred_work+0x129/0x280 [ionic 59bdfc8a035436e1c4224ff7d10789e3f14643f8] process_one_work+0x145/0x360 worker_thread+0x2bb/0x3d0 ? __pfx_worker_thread+0x10/0x10 kthread+0xcc/0x100 ? __pfx_kthread+0x10/0x10 ret_from_fork+0x2d/0x50 ? __pfx_kthread+0x10/0x10 ret_from_fork_asm+0x1a/0x30

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-39502 is a Linux kernel reliability flaw in the ionic network driver. Certain network queue reconfiguration states can cause the kernel to call NAPI on an unregistered queue and hit a kernel BUG. The evidence points mainly to local or administrative-triggered denial of service, not remote compromise.

Executive priority

Treat as a targeted stability risk. Patch affected Linux hosts during normal kernel maintenance, with higher priority for critical systems using ionic network adapters or Siemens-managed products that cite this CVE.

Technical view

The ionic driver uses a stale NAPI poll pointer after netif_napi_del(), because deletion does not reset that pointer. ionic_qcq_enable() may then call napi_enable() on an unregistered NAPI object, producing an invalid-op kernel crash during queue start or link-status work.

Likely exposure

Exposure is most likely on Linux systems using the ionic network driver and vulnerable kernel builds listed by the CVE record. Debian LTS and Siemens advisories reference this CVE, but product-specific impact must be checked in those advisories or vendor guidance.

Exploitation context

The bundle provides a local ethtool-based reproducer and crash trace. KEV status is false, and no cited source states active exploitation. Evidence does not support claiming remote exploitation or privilege escalation.

Researcher notes

The record supplies a concrete root cause and crash path but no CVSS, CWE, or active exploitation evidence. The affected-version data should be normalized against distribution kernel package versions before reporting fleet exposure.

Mitigation direction

  • Apply distribution or vendor kernel updates containing the referenced stable Linux fixes.
  • Prioritize systems using the ionic network driver in production or appliance environments.
  • Check Debian LTS and Siemens advisories for product-specific update instructions.
  • Limit network interface queue reconfiguration to trusted administrators until patched.

Validation and detection

  • Inventory systems for Linux kernels and active ionic network driver usage.
  • Compare running kernel packages with vendor advisories and stable fix inclusion.
  • Review kernel logs for ionic-related BUG, Oops, or napi_enable crash traces.
  • Confirm patched kernels remain stable during approved network configuration changes.
Prepared
Confidence
medium
Sources
9

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

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-39502 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
3ADP providers
12Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

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.

ADP provider summaries

CVECVE Program Container
CISA-ADPCISA ADP Vulnrichment
other:ssvc
siemens-SADPADP container

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux0f3154e6bcb354968cc04f7cd86ce466f7b9a814, 0f3154e6bcb354968cc04f7cd86ce466f7b9a814, 0f3154e6bcb354968cc04f7cd86ce466f7b9a814, 0f3154e6bcb354968cc04f7cd86ce466f7b9a814, 0f3154e6bcb354968cc04f7cd86ce466f7b9a814, 0f3154e6bcb354968cc04f7cd86ce466f7b9a814, 0f3154e6bcb354968cc04f7cd86ce466f7b9a814unaffected
LinuxLinux5.4, 0, 5.4.279, 5.10.221, 5.15.162, 6.1.95, 6.6.35, 6.9.6, 6.10affected
Weakness

CWE details

No CWE listed

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