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CVE Record

CVE-2022-49227: igc: avoid kernel warning when changing RX ring parameters

In the Linux kernel, the following vulnerability has been resolved: igc: avoid kernel warning when changing RX ring parameters Calling ethtool changing the RX ring parameters like this: $ ethtool -G eth0 rx 1024 on igc triggers kernel warnings like this: [ 225.198467] ------------[ cut here ]------------ [ 225.198473] Missing unregister, handled but fix driver [ 225.198485] WARNING: CPU: 7 PID: 959 at net/core/xdp.c:168 xdp_rxq_info_reg+0x79/0xd0 [...] [ 225.198601] Call Trace: [ 225.198604] <TASK> [ 225.198609] igc_setup_rx_resources+0x3f/0xe0 [igc] [ 225.198617] igc_ethtool_set_ringparam+0x30e/0x450 [igc] [ 225.198626] ethnl_set_rings+0x18a/0x250 [ 225.198631] genl_family_rcv_msg_doit+0xca/0x110 [ 225.198637] genl_rcv_msg+0xce/0x1c0 [ 225.198640] ? rings_prepare_data+0x60/0x60 [ 225.198644] ? genl_get_cmd+0xd0/0xd0 [ 225.198647] netlink_rcv_skb+0x4e/0xf0 [ 225.198652] genl_rcv+0x24/0x40 [ 225.198655] netlink_unicast+0x20e/0x330 [ 225.198659] netlink_sendmsg+0x23f/0x480 [ 225.198663] sock_sendmsg+0x5b/0x60 [ 225.198667] __sys_sendto+0xf0/0x160 [ 225.198671] ? handle_mm_fault+0xb2/0x280 [ 225.198676] ? do_user_addr_fault+0x1eb/0x690 [ 225.198680] __x64_sys_sendto+0x20/0x30 [ 225.198683] do_syscall_64+0x38/0x90 [ 225.198687] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 225.198693] RIP: 0033:0x7f7ae38ac3aa igc_ethtool_set_ringparam() copies the igc_ring structure but neglects to reset the xdp_rxq_info member before calling igc_setup_rx_resources(). This in turn calls xdp_rxq_info_reg() with an already registered xdp_rxq_info. Make sure to unregister the xdp_rxq_info structure first in igc_setup_rx_resources.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2022-49227 is a Linux kernel driver issue in igc, tied to changing receive ring settings. The public description shows it causes kernel warnings because driver state was not properly unregistered before reuse. The disclosed impact is operational noise or instability risk, not confirmed data theft or remote compromise.

Executive priority

Treat as routine kernel maintenance unless affected systems show network driver warnings or operational instability. There is no source-backed evidence of remote exploitation or KEV status, but patch during the next normal Linux update cycle.

Technical view

In igc_ethtool_set_ringparam(), the driver copies an igc_ring structure without resetting xdp_rxq_info. igc_setup_rx_resources() then calls xdp_rxq_info_reg() on an already registered structure, producing a kernel warning. The fix unregisters xdp_rxq_info first in igc_setup_rx_resources().

Likely exposure

Systems running affected Linux kernel versions with the igc network driver are the relevant exposure. The source lists Linux 5.13, 5.15.33, 5.16.19, 5.17.2, and 5.18 as affected entries, but downstream distribution status must be checked separately.

Exploitation context

No active exploitation is reported in the provided sources, and this CVE is not listed as KEV. The trigger described is changing RX ring parameters through ethtool-like network configuration paths, which typically requires local administrative privileges.

Researcher notes

The public record frames this as a resolved Linux kernel driver correctness issue. Impact details are limited to a kernel warning. Confirm applicability through kernel source, distro changelogs, and whether the igc driver is present and active.

Mitigation direction

  • Apply a Linux kernel or distribution update containing the referenced stable fixes.
  • Check your distribution advisory for backported igc fixes before relying on version numbers.
  • Limit RX ring parameter changes on affected igc systems until patched.

Validation and detection

  • Inventory systems using the Linux igc network driver.
  • Compare running kernel packages against vendor advisories and referenced stable commits.
  • Review kernel logs for related igc or xdp_rxq_info warnings after network tuning changes.
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

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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
LinuxLinux73f1071c1d2952b8c93cd6cd99744768c59ec840, 73f1071c1d2952b8c93cd6cd99744768c59ec840, 73f1071c1d2952b8c93cd6cd99744768c59ec840, 73f1071c1d2952b8c93cd6cd99744768c59ec840unaffected
LinuxLinux5.13, 0, 5.15.33, 5.16.19, 5.17.2, 5.18affected
Weakness

CWE details

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