LiveActive security incident?Get immediate response
CVE Record

CVE-2022-49903: ipv6: fix WARNING in ip6_route_net_exit_late()

In the Linux kernel, the following vulnerability has been resolved: ipv6: fix WARNING in ip6_route_net_exit_late() During the initialization of ip6_route_net_init_late(), if file ipv6_route or rt6_stats fails to be created, the initialization is successful by default. Therefore, the ipv6_route or rt6_stats file doesn't be found during the remove in ip6_route_net_exit_late(). It will cause WRNING. The following is the stack information: name 'rt6_stats' WARNING: CPU: 0 PID: 9 at fs/proc/generic.c:712 remove_proc_entry+0x389/0x460 Modules linked in: Workqueue: netns cleanup_net RIP: 0010:remove_proc_entry+0x389/0x460 PKRU: 55555554 Call Trace: <TASK> ops_exit_list+0xb0/0x170 cleanup_net+0x4ea/0xb00 process_one_work+0x9bf/0x1710 worker_thread+0x665/0x1080 kthread+0x2e4/0x3a0 ret_from_fork+0x1f/0x30 </TASK>

UnknownCVSS not scoredNot KEV-listedUpdated
Discuss exposureBack to CVEs
Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

This Linux kernel issue can trigger a kernel warning during IPv6 network namespace cleanup when expected proc files were not created during initialization. The public record does not show code execution, privilege escalation, data exposure, CVSS scoring, or known exploitation.

Executive priority

Treat as a maintenance-priority kernel update until stronger impact evidence appears. There is no supplied evidence of exploitation or severe business impact, but kernel hygiene remains important on shared infrastructure.

Technical view

The bug is in IPv6 route proc cleanup. If ipv6_route or rt6_stats creation fails during ip6_route_net_init_late(), later ip6_route_net_exit_late() may try to remove a missing proc entry and trigger remove_proc_entry WARNING during netns cleanup.

Likely exposure

Exposure is limited to Linux systems running affected kernel versions or branches listed in the CVE record. The bundle provides upstream stable commit references but no package names, CPEs, or distribution-specific advisories.

Exploitation context

No active exploitation is supported by the supplied sources. KEV is false, and the source bundle describes a kernel warning condition rather than a demonstrated attack path.

Researcher notes

The record lacks CVSS, CWE, CPEs, exploit evidence, and distribution package mappings. The described failure path is initialization error handling followed by cleanup of absent proc entries, producing a warning in remove_proc_entry.

Mitigation direction

  • Update to a Linux kernel containing the referenced upstream stable fixes.
  • Check Linux distribution advisories for backported package versions.
  • Prioritize systems using IPv6 and network namespace-heavy workloads.
  • Include this in routine kernel patch cycles unless vendor guidance raises severity.

Validation and detection

  • Inventory Linux kernel versions across servers, containers hosts, and appliances.
  • Compare running kernels with vendor advisories and referenced stable commits.
  • Review kernel logs for related IPv6 route cleanup warnings.
  • Confirm distribution packages include the upstream fix or a documented backport.
Prepared
Confidence
medium
Sources
8

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

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cve · low confidence lookup

CVE-2022-49903 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

Open ATT&CK lookup
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
7Source 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
LinuxLinuxcdb1876192dbe680b3ac955717fdf7f863c1762d, cdb1876192dbe680b3ac955717fdf7f863c1762d, cdb1876192dbe680b3ac955717fdf7f863c1762d, cdb1876192dbe680b3ac955717fdf7f863c1762d, cdb1876192dbe680b3ac955717fdf7f863c1762d, cdb1876192dbe680b3ac955717fdf7f863c1762dunaffected
LinuxLinux2.6.26, 0, 4.19.265, 5.4.224, 5.10.154, 5.15.78, 6.0.8, 6.1affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.