Security readout for executives and security teams
Plain-English summary
CVE-2022-49207 is a Linux kernel memory leak in the BPF sockmap path. A local low-privileged user could trigger a kernel resource leak during socket teardown, potentially causing a denial of service. It is not described as a data theft or code execution issue.
Executive priority
Treat this as a moderate availability risk. It should be patched through normal kernel maintenance, with faster handling on multi-user or shared compute systems where local low-privileged access is common.
Technical view
The flaw is in sk_psock_queue_msg during tcp_bpf_sendmsg and sockmap teardown. A race can drop a message after memory and page references were charged, leaking resources. The kernel fix frees the sk_msg data correctly before releasing the message object.
Likely exposure
Exposure is most relevant on Linux systems running affected kernel versions and allowing local users or workloads to exercise BPF sockmap networking paths. The source data identifies local attack vector, low privileges, no user interaction, and high availability impact.
Exploitation context
The provided sources do not show active exploitation, and the CVE is not marked KEV. Exploitation is local, not network-borne, and appears focused on resource exhaustion rather than confidentiality or integrity compromise.
Researcher notes
Evidence supports CWE-401 memory leak and CVSS 5.5. The issue is a race between tcp_bpf_sendmsg redirection and sockmap close teardown. Source material gives fix references but not distribution-specific affected package ranges or public exploit evidence.
Mitigation direction
- Update affected Linux kernels to vendor-supported builds containing the referenced stable fixes.
- Check Linux distribution advisories for exact fixed package versions.
- Prioritize shared servers, developer hosts, and container platforms with untrusted local workloads.
- Review OS policy for limiting untrusted local access to BPF features.
- Monitor for kernel warnings involving sk_stream_kill_queues, inet_sock_destruct, or psock teardown.
Validation and detection
- Inventory Linux kernel versions across affected assets.
- Map deployed kernels against vendor advisories and the referenced stable commits.
- Confirm whether untrusted local users or workloads can access BPF sockmap functionality.
- Review kernel logs for matching warning traces during socket destruction.
- Verify patched systems are running the updated kernel after reboot.
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-401: 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-2022-49207 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/ef9785f429794567792561a584901faa9291d3eeCVE reference, Linux
- https://git.kernel.org/stable/c/4dd2e947d3be13a4de3b3028859b9a6497266bcfCVE reference, Linux
- https://git.kernel.org/stable/c/03948ed6553960db62f1c33bec29e64d7c191a3fCVE reference, Linux
- https://git.kernel.org/stable/c/938d3480b92fa5e454b7734294f12a7b75126f09CVE 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.
Missing Release of Memory after Effective Lifetime
Missing Release of Memory after Effective Lifetime represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.