CVE-2026-54417: CWE-190 Integer Overflow or Wraparound in rxi microtar
CVE-2026-54417 is an integer overflow vulnerability in the mtar_next() function of rxi microtar version 0.1.0. The vulnerability occurs when processing crafted tar archives with a header size field that causes 32-bit arithmetic overflow, leading to an infinite loop and 100% CPU usage. This results in a denial of service condition. No official patch or remediation has been indicated yet.
AI Analysis
Technical Summary
The vulnerability exists in the mtar_next() function in src/microtar.c of rxi microtar 0.1.0. The function calculates the offset to the next tar record using 32-bit arithmetic: round_up(h.size, 512) + sizeof(mtar_raw_header_t). If the header size field is a multiple of 512 within the range 0xFFFFFC01 to 0xFFFFFE00, the addition overflows and wraps to zero. Consequently, mtar_next() does not advance the file pointer but repeatedly processes the same record, causing mtar_find() and loops iterating over entries to hang indefinitely with full CPU consumption. This is an integer overflow leading to a denial of service via infinite loop.
Potential Impact
An attacker can supply a specially crafted tar archive that triggers the integer overflow, causing the affected process to enter an infinite loop and consume 100% CPU. This results in a denial of service condition, potentially disrupting applications or services relying on rxi microtar 0.1.0 for tar archive processing. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted tar archives with rxi microtar 0.1.0. Monitor for updates from the vendor or project maintainer regarding an official fix or workaround.
CVE-2026-54417: CWE-190 Integer Overflow or Wraparound in rxi microtar
Description
CVE-2026-54417 is an integer overflow vulnerability in the mtar_next() function of rxi microtar version 0.1.0. The vulnerability occurs when processing crafted tar archives with a header size field that causes 32-bit arithmetic overflow, leading to an infinite loop and 100% CPU usage. This results in a denial of service condition. No official patch or remediation has been indicated yet.
CVSS v3.1
Score 7.5high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability exists in the mtar_next() function in src/microtar.c of rxi microtar 0.1.0. The function calculates the offset to the next tar record using 32-bit arithmetic: round_up(h.size, 512) + sizeof(mtar_raw_header_t). If the header size field is a multiple of 512 within the range 0xFFFFFC01 to 0xFFFFFE00, the addition overflows and wraps to zero. Consequently, mtar_next() does not advance the file pointer but repeatedly processes the same record, causing mtar_find() and loops iterating over entries to hang indefinitely with full CPU consumption. This is an integer overflow leading to a denial of service via infinite loop.
Potential Impact
An attacker can supply a specially crafted tar archive that triggers the integer overflow, causing the affected process to enter an infinite loop and consume 100% CPU. This results in a denial of service condition, potentially disrupting applications or services relying on rxi microtar 0.1.0 for tar archive processing. There is no impact on confidentiality or integrity reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, avoid processing untrusted tar archives with rxi microtar 0.1.0. Monitor for updates from the vendor or project maintainer regarding an official fix or workaround.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TuranSec
- Date Reserved
- 2026-06-13T16:39:46.122Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a32a8a20b89be6888635f16
Added to database: 06/17/2026, 14:01:06 UTC
Last enriched: 06/24/2026, 16:32:11 UTC
Last updated: 08/01/2026, 11:57:03 UTC
Views: 53
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