Gnu Gawk vulnerabilities

CVE-2026-40468 [CRITICAL] CWE-190 CVE-2026-40468: Integer overflow vulnerability has been found in "builtin.c" program file of gawk. This issue may le Integer overflow vulnerability has been found in "builtin.c" program file of gawk. This issue may lead to memory exhaustion on the hosting operating system and could be used to overwrite gawk heap metadata and objects with attacker-controlled bytes. It affects gawk in versions 5.4.0 and below.

CVE-2026-40469 [CRITICAL] CWE-190 CVE-2026-40469: Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine) Integer overflow vulnerability has been found in "builtin.c" program file of gawk (do_sub() routine). This issue could be used to overwrite gawk heap metadata and objects causing the program to crash. It affects 32-bit builds of gawk in versions 5.4.0 and below.

CVE-2026-40553 [HIGH] CWE-121 CVE-2026-40553: Buffer overflow vulnerability has been found in "extension/readdir.c" program file of gawk (ftype() Buffer overflow vulnerability has been found in "extension/readdir.c" program file of gawk (ftype() routine). This issue could be used to crash the program and potentially to achieve code execution, although the latter has not been confirmed to be feasible. It affects gawk in versions 5.4.0 and below.

CVE-2026-40467 [HIGH] CWE-416 CVE-2026-40467: Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routi Use After Free vulnerability has been found in "io.c" program file of gawk (do_getline_redir() routine). This issue may lead to a crash. It affects gawk in versions 5.4.0 and below.

CVE-2023-4156 [HIGH] CWE-125 CVE-2023-4156: A heap out-of-bounds read flaw was found in builtin.c in the gawk package. This issue may lead to a A heap out-of-bounds read flaw was found in builtin.c in the gawk package. This issue may lead to a crash and could be used to read sensitive information.