Security readout for executives and security teams
Plain-English summary
CVE-2024-26902 is a Linux kernel bug in RISC-V performance monitoring code that can crash the system. The public record shows a kernel panic when branch performance recording is used on Sophgo SG2042 hardware. Business impact is availability risk, mainly for organizations running affected RISC-V Linux systems.
Executive priority
Prioritize patching where RISC-V Linux systems support production workloads or observability jobs using perf. For non-RISC-V fleets, urgency is low unless vendor advisories identify affected downstream kernels.
Technical view
The bug is in the RISC-V perf PMU overflow handler. The fix changes bit setting for an unsigned long overflow counter to use BIT(), avoiding an invalid state that led to a NULL pointer dereference and panic in interrupt context.
Likely exposure
Exposure appears limited to affected Linux kernels on RISC-V systems using the perf PMU overflow path. The source specifically reports Sophgo SG2042 hardware. No CPEs or distribution package details are provided.
Exploitation context
The source describes a reproducible panic during branch performance recording. KEV is false, and the bundle provides no evidence of active exploitation, remote exploitation, privilege escalation, or public weaponization.
Researcher notes
The record lacks CVSS, CWE, CPE, and detailed affected-version range semantics. Treat the listed Linux versions and commit references as the strongest evidence. Do not generalize beyond RISC-V perf PMU behavior without vendor confirmation.
Mitigation direction
- Apply a Linux stable kernel containing the referenced fixes.
- Use vendor or distribution kernel updates when available.
- Avoid branch-event perf recording on affected RISC-V systems until updated.
- Monitor Linux and distribution advisories for package-specific guidance.
Validation and detection
- Inventory RISC-V Linux systems and kernel versions.
- Check whether kernels include the referenced stable commits.
- Review kernel logs for RISC-V PMU overflow panic traces.
- Confirm perf-based monitoring workloads after patching in a test environment.
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
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ATT&CK lookup starting points
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CVE-2024-26902 mapping review
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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/3ede8e94de6b834b48b0643385e66363e7a04be9CVE reference, Linux
- https://git.kernel.org/stable/c/9f599ba3b9cc4bdb8ec1e3f0feddd41bf9d296d6CVE reference, Linux
- https://git.kernel.org/stable/c/34b567868777e9fd39ec5333969728a7f0cf179cCVE 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.