Security readout for executives and security teams
Plain-English summary
This Linux kernel issue affects virtual socket traffic used by some VM host-guest communication paths. Large file transfers over SFTP-over-vsock can trigger kernel memory allocation failures. The public record does not provide CVSS, CWE, or confirmed business impact, so urgency depends on whether affected systems use vhost/vsock.
Executive priority
Treat this as a targeted Linux virtualization maintenance item, not a broad emergency from current evidence. Prioritize patch confirmation on virtualization hosts and platforms relying on vsock file transfer, especially where availability issues have been observed.
Technical view
In vhost/vsock transmit handling, large packets around 32 kB used kmalloc, which can fail under allocation pressure because it needs higher-order contiguous pages. Kernel stable fixes switch the allocation/free path to kvmalloc/kvfree, which can fall back to vmalloc for larger allocations.
Likely exposure
Exposure is most likely on Linux systems running affected kernel versions with vhost_vsock enabled for VM or sandbox host-guest communication. General Linux servers that do not use vsock or vhost_vsock appear less likely exposed, based only on the provided record.
Exploitation context
The source bundle describes allocation failures during large SFTP-over-vsock transfers. It does not cite active exploitation, public exploit code, KEV listing, privilege requirements, or a demonstrated crash path beyond kernel allocation failure logs.
Researcher notes
Evidence is limited to the CVE record and Linux stable commit references. No CVSS, CWE, exploit status, or full impact statement is provided. The fix changes allocation strategy, suggesting an availability or reliability issue tied to memory allocation behavior.
Mitigation direction
- Identify Linux kernels using vhost_vsock or vsock-based host-guest communication.
- Update to a vendor kernel containing the referenced stable fixes.
- Check Linux distribution advisories for backported CVE-2022-50271 fixes.
- Prioritize virtualization hosts or platforms that support SFTP-over-vsock file transfer.
- Monitor kernel logs for vhost_vsock page allocation failures until patched.
Validation and detection
- Inventory kernel versions against vendor advisories and the CVE record.
- Confirm whether vhost_vsock is loaded or required on each host.
- Verify patched kernels include the kvmalloc/kvfree stable commit for this issue.
- Review logs for repeated vhost_vsock allocation failure messages.
- Document systems where vsock is unused as lower priority.
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-2022-50271 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/0d720c3f0a03e97867deab7e480ba3d3e19837baCVE reference, Linux
- https://git.kernel.org/stable/c/7aac8c63f604e6a6a46560c0f0188cd0332cf320CVE reference, Linux
- https://git.kernel.org/stable/c/e6d0152c95108651f1880c1ddfab47cb9e3e62d0CVE reference, Linux
- https://git.kernel.org/stable/c/b4a5905fd2ef841cd61e969ea692c213c2e5c1f7CVE reference, Linux
- https://git.kernel.org/stable/c/e28a4e7f0296824c61a81e7fd54ab48bad3e75adCVE reference, Linux
- https://git.kernel.org/stable/c/a99fc6d818161d6f1ff3307de8bf5237f6cc34d8CVE reference, Linux
- https://git.kernel.org/stable/c/36c9f340c60413e28f980c0224c4e9d35851526bCVE reference, Linux
- https://git.kernel.org/stable/c/0e3f72931fc47bb81686020cc643cde5d9cd0bb8CVE 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.