Security readout for executives and security teams
Plain-English summary
A remote client can send malformed Linux SMC connection data that is not adequately validated. The kernel may then access an incorrect memory address and crash. This creates serious availability risk for exposed systems; the supplied description does not establish data theft or modification despite the 9.8 CVSS vector.
Executive priority
Treat this as an urgent patch-validation issue for reachable SMC-enabled Linux servers. First identify externally or broadly reachable systems, then confirm distributor fixes and schedule updates. The critical score warrants rapid action, but current evidence supports crash risk—not confirmed compromise or active exploitation.
Technical view
The Linux SMC server path trusted client-controlled v2_ext_offset, eid_cnt, and ism_gid_cnt fields before safely validating their bounds. An excessive offset or invalid count can produce an incorrect address access. The cited stable patches validate these fields before use. The documented concrete consequence is a possible kernel crash.
Likely exposure
Exposure requires a Linux system running an affected kernel with the SMC server path available and reachable by a remote client. Internet-facing or untrusted-network reachability increases concern. The bundled version metadata is ambiguous, so distributors’ backport status must be checked rather than relying only on displayed version numbers.
Exploitation context
The CVSS vector describes network access, low complexity, no privileges, and no user interaction. However, the bundle provides no KEV listing or cited evidence of active exploitation. It also provides no public exploit details. Treat exploitation status as unconfirmed while prioritizing reachable systems because a malformed proposal may crash the kernel.
Researcher notes
The supplied affected-version list lacks clear range semantics and includes commit identifiers marked unaffected, so exact vulnerable boundaries cannot be stated confidently. Three stable-kernel commits are cited. Analysis should distinguish the documented incorrect-address crash from the CVSS confidentiality and integrity ratings, which are not explained by the provided vulnerability description.
Mitigation direction
- Upgrade to a supported kernel containing the applicable cited stable fix or distributor backport.
- Check the Linux distributor’s advisory for exact affected builds and remediation guidance.
- Until updated, restrict untrusted network access to systems exposing the SMC server path.
- Prioritize externally reachable, business-critical, and high-availability Linux systems.
Validation and detection
- Inventory deployed kernel versions, builds, and distributor patch levels.
- Determine whether SMC is available, used, and reachable from untrusted networks.
- Confirm the installed kernel includes the applicable stable fix or distributor backport.
- After updating, verify the new kernel is running and exposure controls remain effective.
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-2024-49568 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
- Critical
- CVSS
- 9.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.
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:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9LinuxVulnerability scoring details
Base CVSS 3.1 score
9.8CriticalVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/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.
Source materials
- CVE List V5 sourceCVE List V5
- https://git.kernel.org/stable/c/295a92e3df32e72aff0f4bc25c310e349d07ffbfCVE reference, Linux
- https://git.kernel.org/stable/c/42f6beb2d5779429417b5f8115a4e3fa695d2a6cCVE reference, Linux
- https://git.kernel.org/stable/c/7863c9f3d24ba49dbead7e03dfbe40deb5888fdfCVE 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.