CVE-2026-81878

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.

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.

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.

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.

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.

This update for radare2 fixes the following issues:

Changes in radare2:

• Update to version 6.2.2:

  • Analysis: new JNI plugin with typed interface tables, arm64 Swift float calling conventions, DWARF prototype linking, jump-table and switch-case fixes
  • Core: fix RAnalOp leaks in disasm/diff/debug loops, aoj memory use, partial-read handling, fp variable recovery
  • Bundle sdb 2.5.2 (upstream pin): rename shlib to libsdb2_5_2
  • Details can be found here: https://github.com/radareorg/radare2/releases/tag/6.2.2

• Security issues fixed:

  • CVE-2026-81886: Validate dmp64 page counts against dump size (boo#1282346).
  • CVE-2026-81885: Fix infinite loop in the NE fixup parser (boo#1282345).
  • CVE-2026-81884: Validate Mach-O LC_DATA_IN_CODE ranges (boo#1282344).
  • CVE-2026-81883: Fix Lua function parser OOB reads (boo#1282343).
  • CVE-2026-81882: Fix bplist Unicode string conversion (boo#1282342).
  • CVE-2026-81881: Fix Swift Mach-O field metadata bounds check (boo#1282341).
  • CVE-2026-81880: Decode PEF relocs lazily, add more bounds and overflow checks (boo#1282340).
  • CVE-2026-81879: Fix oobread in ELF PN_XNUM phdr count handling (boo#1282339).
  • CVE-2026-81878: Fix heap write overflow in Python loader (boo#1282338).
  • CVE-2026-14788: Denial of Service via use-after-free in r_core_bin_load function (boo#1270453).
  • CVE-2026-14761: Denial of service via integer overflow in string manipulation functions (boo#1270452).
  • CVE-2026-14760: Denial of Service via local use-after-free vulnerability (boo#1270450).
  • CVE-2026-14759: Denial of Service via heap-based buffer overflow (boo#1270449).
  • CVE-2026-14758: Denial of Service via integer overflow in hexpairs parser (boo#1270447).
  • CVE-2026-14757: Integer overflow allows local impact (boo#1270445).
  • CVE-2026-40527: Command injection vulnerability in the afsv/afsvj (boo#1262336).
  • CVE-2026-4174: Missing validation against an upper limit when allocating memory in the Mach-O file parser can lead to excessive resource consumption (boo#1259722).

• Security issue fixed with the previous release:

  • CVE-2026-41015: Configured on UNIX without SSL, allows command injection via a PDB name to rabin2 (boo#1262190).
  • CVE-2026-40517: Crafted PDB file with newline characters in symbol names can allow to inject arbitrary commands (boo#1262680).
  • CVE-2026-8695: UAFs in the gdb remote protocol ##crash (boo#1265403).