CVE-2026-35352

Summary

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mkfifo utility of uutils coreutils. The utility creates a FIFO and then performs a path-based chmod to set permissions. A local attacker with write access to the parent directory can swap the newly created FIFO for a symbolic link between these two operations. This redirects the chmod call to an arbitrary file, potentially enabling privilege escalation if the utility is run with elevated privileges.

Affected Software

Weaknesses

• CWE-367: CWE-367: Time-of-Check Time-of-Use (TOCTOU) Race Condition

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

Additional References

• https://github.com/uutils/coreutils/issues/10020

CVE Program Container

Additional References

• http://www.openwall.com/lists/oss-security/2026/05/04/4
• http://www.openwall.com/lists/oss-security/2026/05/04/5
• http://www.openwall.com/lists/oss-security/2026/05/04/6

References

• https://github.com/uutils/coreutils/issues/10020

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