Integer Overflow or Wraparound Affecting radare2 package, versions *
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published24 Sept 2026
- disclosed22 Sept 2026
Introduced: 22 Sep 2026
NewCVE-2026-81878 (opens in a new tab)How to fix?
There is no fixed version for Debian:unstable radare2.
NVD Description
Note: Versions mentioned in the description apply only to the upstream radare2 package and not the radare2 package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's CPython bytecode .pyc marshal parser was vulnerable because the CPython marshal readers accepted a 32-bit string length without rejecting values that overflow the size-plus-one allocation. The vulnerability is triggered by opening or inspecting a crafted .pyc file through r2 or rabin2. A length of 0xffffffff wrapped the allocation to zero before the common byte reader wrote attacker-controlled data and fill bytes beyond the heap allocation. This can cause heap memory corruption and denial of service; arbitrary code execution is possible but has not been demonstrated. This issue is fixed in version 6.2.0.
References
- https://security-tracker.debian.org/tracker/CVE-2026-81878
- https://github.com/radareorg/radare2/commit/6727454b666b28c33837b219a5f91136461357c0
- https://github.com/radareorg/radare2/pull/26177
- https://github.com/radareorg/radare2/releases/tag/6.2.0
- https://github.com/radareorg/radare2/security/advisories/GHSA-9phv-v2w8-56j3
- https://github.com/radareorg/radare2/issues/26222