CVE-2026-62958 (GCVE-0-2026-62958)

Vulnerability from cvelistv5 – Published: 2026-10-30 20:44 – Updated: 2026-11-02 14:55
VLAI
Title
libriscv: Out of bounds read vuln in the ELF parser (Denial of service)
Summary
libriscv is a RISC-V sandbox and emulator. Prior to 1.18, a crafted ELF binary can cause out-of-bounds reads in the host emulator. `Memory<W>::binary_loader` checks `PT_LOAD` program-header bounds, but `Memory<W>::serialize_execute_segment` trusts section-header `sh_offset` and `sh_size` when locating `.text` without verifying the file range against `m_binary.size()`; `Memory<W>::lookup()` has a similar section-table problem. Malformed `.text` or `.symtab` offsets can therefore bypass the program-header checks and point outside the binary buffer, crashing rvlinux. With suitable memory layout or integer overflow, out-of-buffer host heap memory may instead be mapped into the guest by `create_execute_segment()`, potentially exposing host memory. The reported reproducer demonstrates a host SIGSEGV, while memory disclosure through grooming is described as possible rather than demonstrated. This issue is fixed in version 1.18.
Severity
7.9 (High)
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H
SSVC
Exploitation: poc Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-02 14:54 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-125 - Out-of-bounds Read
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
libriscv libriscv Affected: < 1.18
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