Security readout for executives and security teams
Plain-English summary
This is a Linux kernel availability issue in the ice network driver. Under certain reset conditions, the driver may use a missing internal pointer and crash. The reported impact is denial of service, not data theft or privilege escalation.
Executive priority
Schedule remediation through standard kernel patching, with priority for network-heavy virtualization hosts using affected driver features. This is not presented as actively exploited, but it can affect availability on exposed systems.
Technical view
CVE-2022-49516 is a CWE-476 NULL pointer dereference in the Linux kernel ice driver. ice_get_vf_vsi can return NULL while a VF VSI is removed and recreated during reset, and several call sites failed to validate it. The fix adds return-value checks throughout the driver.
Likely exposure
Exposure is most relevant to Linux hosts running affected kernel versions with the ice network driver and virtual-function handling in use. The source bundle does not provide distribution package names, CPEs, or evidence of broad remote exposure.
Exploitation context
The CVSS vector is local, low complexity, low privileges required, no user interaction, and high availability impact. The source bundle says KEV is false and provides no evidence of active exploitation or public exploit code.
Researcher notes
Evidence is limited to the CVE record and Linux stable commit references. The core issue is defensive NULL checking around ice_get_vf_vsi. Do not assume affected distributions, exploitability beyond the CVSS vector, or mitigations not named by vendors.
Mitigation direction
- Apply Linux kernel updates that include the referenced stable fixes.
- Check distribution or vendor advisories for backported fixed kernel packages.
- Prioritize systems using the ice driver and virtual-function networking features.
- Plan any required reboot or driver reload through normal change control.
Validation and detection
- Inventory Linux kernel versions against the affected version data in the CVE source.
- Identify hosts using the ice network driver and VF-related functionality.
- Confirm patched kernels include fixes equivalent to the referenced stable commits.
- Review crash or reset logs for ice driver failures during VF lifecycle events.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-476: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2022-49516 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 5.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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.
SSVC decision data
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADPVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- CVE publishedCVE Program
The CVE record was published.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/e7be3877589d539c52e5d1d23a625f889b541b9dCVE reference, Linux
- https://git.kernel.org/stable/c/baeb705fd6a7245cc1fa69ed991a9cffdf44a174CVE reference, Linux
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
NULL Pointer Dereference
NULL Pointer Dereference represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.