Security readout for executives and security teams
Plain-English summary
This is a Linux kernel reliability and security issue in the SMC networking code. A race can leave the kernel using a released socket pointer, causing a kernel NULL pointer crash. The source does not show data theft, privilege escalation, or active exploitation, but affected production Linux systems could face availability risk.
Executive priority
Handle through normal kernel security maintenance, with faster scheduling for high-availability Linux workloads or environments using SMC. There is no source-backed evidence of active exploitation, but kernel crashes can still create business disruption.
Technical view
CVE-2022-48751 addresses a race in net/smc where smc_setsockopt(), and defensively smc_getsockopt() and smc_switch_to_fallback(), may access smc->clcsock after release. The upstream fix adds locking and release checks before dereferencing clcsock, changing fallback handling to report success or failure through return values.
Likely exposure
Exposure appears limited to Linux systems running affected kernel versions with the SMC subsystem available or used. The bundle lists Linux as affected and references stable kernel fixes, but does not provide distribution package mappings or CPEs.
Exploitation context
The CVE source describes a kernel crash observed during setsockopt handling. It does not identify public exploit code, active exploitation, KEV listing, remote reachability, or attacker prerequisites. Treat exploitation details as incomplete.
Researcher notes
The source evidence supports an availability-oriented kernel race in net/smc, not broader impact claims. Affected-version metadata is sparse and lacks CPEs, so distribution-specific validation is necessary before concluding exposure or remediation status.
Mitigation direction
- Update to a vendor kernel containing the referenced stable fixes.
- Check Linux distribution advisories for package-specific fixed versions.
- Prioritize critical systems using SMC or affected kernel branches.
- If patch timing is constrained, review vendor guidance for safe SMC risk reduction.
Validation and detection
- Inventory Linux kernel versions across production and edge systems.
- Check whether the SMC kernel module or subsystem is present or loaded.
- Map installed kernels to distribution advisories or the referenced stable commits.
- Review crash logs for NULL dereferences in smc_setsockopt or related SMC paths.
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
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CVE-2022-48751 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.
SSVC decision data
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/38f0bdd548fd2ef5d481b88d8a2bfef968452e34CVE reference, Linux
- https://git.kernel.org/stable/c/4284225cd8001e134f5cf533a7cd244bbb654d0fCVE reference, Linux
- https://git.kernel.org/stable/c/c0bf3d8a943b6f2e912b7c1de03e2ef28e76f760CVE 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.