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https://issues.oss-fuzz.com/issues/519999738

Reference Info: 519999738 binutils:fuzz_as: Use-of-uninitialized-value in
demand_empty_rest_of_line
component:  Public Trackers > 1362134 > OSS Fuzz
status:  New
reporter:  [email protected]
cc:  [email protected], [email protected], [email protected], and 2 more
collaborators:  [email protected]
type:  Vulnerability
access level:  Limited visibility
priority:  P2
severity:  S2
hotlist:  Reproducible, Stability-LibFuzzer,
Stability-Memory-MemorySanitizer
retention:  Component default
Project:  binutils
Reported:  Jun 4, 2026

[email protected] added comment #1:
Detailed Report: https://oss-fuzz.com/testcase?key=5905500238839808

Project: binutils
Fuzzing Engine: libFuzzer
Fuzz Target: fuzz_as
Job Type: libfuzzer_msan_binutils
Platform Id: linux

Crash Type: Use-of-uninitialized-value
Crash Address:
Crash State:
  demand_empty_rest_of_line
  s_comm_internal
  read_a_source_file

Sanitizer: memory (MSAN)

Recommended Security Severity: Medium

Regressed:
https://oss-fuzz.com/revisions?job=libfuzzer_msan_binutils&range=202407250601:202407260631

Reproducer Testcase:
https://oss-fuzz.com/download?testcase_id=5905500238839808

Issue filed automatically.

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