CVE-2026-54417: CWE-190 Integer Overflow or Wraparound in rxi microtar
An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic.
AI Analysis
Technical Summary
The vulnerability exists in the mtar_next function in src/microtar.c of rxi microtar 0.1.0. The function computes the offset to the next tar record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic. An attacker can craft a tar archive that causes this calculation to overflow, leading to an infinite loop or excessive CPU usage, resulting in a denial of service condition. This is classified under CWE-190 (Integer Overflow or Wraparound) and CWE-835 (Loop with Unreachable Exit Condition).
Potential Impact
Successful exploitation results in denial of service due to uncontrolled CPU consumption or an infinite loop. There is no impact on confidentiality or integrity reported. The vulnerability can be triggered remotely by processing a malicious tar archive.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been published at this time.
CVE-2026-54417: CWE-190 Integer Overflow or Wraparound in rxi microtar
Description
An integer overflow in the mtar_next function in src/microtar.c in rxi microtar 0.1.0 allows a remote attacker to cause a denial of service (uncontrolled CPU consumption / infinite loop) via a crafted tar archive. mtar_next computes the offset to the next record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic.
CVSS v3.1
Score 7.5high
Affected software
rxi
microtar
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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 computes the offset to the next tar record as round_up(h.size, 512) + sizeof(mtar_raw_header_t) using 32-bit arithmetic. An attacker can craft a tar archive that causes this calculation to overflow, leading to an infinite loop or excessive CPU usage, resulting in a denial of service condition. This is classified under CWE-190 (Integer Overflow or Wraparound) and CWE-835 (Loop with Unreachable Exit Condition).
Potential Impact
Successful exploitation results in denial of service due to uncontrolled CPU consumption or an infinite loop. There is no impact on confidentiality or integrity reported. The vulnerability can be triggered remotely by processing a malicious tar archive.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation has been published at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- TuranSec
- Date Reserved
- 2026-06-13T16:39:46.122Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a32a8a20b89be6888635f16
Added to database: 06/17/2026, 14:01:06 UTC
Last enriched: 08/10/2026, 13:05:19 UTC
Last updated: 09/15/2026, 10:01:33 UTC
Views: 83
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