Security readout for executives and security teams
Plain-English summary
This Linux kernel flaw is in BPF sockmap message handling. Under specific redirect conditions, the kernel can mis-account socket memory and trigger kernel warnings during socket cleanup. The public record does not show confirmed exploitation, a CVSS score, or a clearly stated business impact beyond kernel warning conditions.
Executive priority
Treat this as a kernel maintenance item unless your environment relies on BPF sockmap features. There is no cited active exploitation or severity score, but kernel defects can affect stability and should be handled through normal patch governance.
Technical view
The issue is in tcp_bpf_send_verdict() when redirected sk_msg data has more_data. Remaining msg->sg.size can be uncharged twice against sk_forward_alloc. The fix charges the remaining size before looping for more data. Sources cite warnings in sk_stream_kill_queues and inet_sock_destruct.
Likely exposure
Exposure appears limited to Linux kernels with the affected BPF sockmap code path. Systems using BPF sockmap or related TCP BPF redirection are the most relevant to check. The bundle lists Linux kernel affected versions and stable commit references, but no distro-specific package matrix.
Exploitation context
No active exploitation is stated. The KEV flag is false, and the provided sources do not describe public exploit activity. The sources describe a kernel accounting defect and warning traces, not a demonstrated compromise path.
Researcher notes
Key evidence is narrow: the CVE record explains the double-uncharge condition and links stable kernel commits. It does not establish exploitability, privilege requirements, or impact beyond warning traces. Validate against upstream commits and downstream vendor backports before assigning urgency.
Mitigation direction
- Check Linux vendor or distribution advisories for CVE-2022-49204 coverage.
- Update affected kernels to releases containing the referenced stable fixes.
- Prioritize hosts using BPF sockmap or TCP BPF redirection features.
- If patching is delayed, review vendor guidance for safe interim controls.
Validation and detection
- Inventory Linux kernel versions across servers, containers hosts, and appliances.
- Compare deployed kernels with vendor advisories for CVE-2022-49204.
- Review kernel logs for the warning locations named in the CVE record.
- Confirm whether BPF sockmap functionality is used in relevant workloads.
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.
CVE-2022-49204 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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.
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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/244ce90c8d0bd10ebf957da02c6f3fcd5d920bdfCVE reference, Linux
- https://git.kernel.org/stable/c/7b812a369e6416ab06d83cdd39d8e3f752781dd0CVE reference, Linux
- https://git.kernel.org/stable/c/168ff181f5b6e7fce684c98a30d35da1dbf8f82aCVE reference, Linux
- https://git.kernel.org/stable/c/87d532d41ef937e16f61b3d2094f3a2ac49be365CVE reference, Linux
- https://git.kernel.org/stable/c/abb4caa477a5450817d2aa1198edce66450aecf8CVE reference, Linux
- https://git.kernel.org/stable/c/84472b436e760ba439e1969a9e3c5ae7c86de39dCVE 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.