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This issue may lead to a crash and could be used to read sensitive information.","status":"published","published":"2023-09-25T18:15:11.013Z","modified":"2026-06-17T06:37:11.89Z","cvss":[{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:08:31.699785Z"}],"osv":[{"id":"AZL-30045","title":"CVE-2023-4156 affecting package gawk for versions less than 5.1.1-1","description":"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.","status":"published","published":"2023-09-25T18:15:11Z","modified":"2026-04-21T04:26:02.163523Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:03.46006Z"},{"id":"BELL-CVE-2023-4156","title":"CVE-2023-4156 does not affect BellSoft software","status":"withdrawn","published":"2023-09-25T18:15:00Z","modified":"2026-01-26T09:45:41.610684Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:28:17.742221Z"},{"id":"CVE-2023-4156","description":"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.","status":"published","published":"2023-09-25T18:15:11.013Z","modified":"2026-03-15T22:47:21.005555Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:33.244128Z"},{"id":"DEBIAN-CVE-2023-4156","description":"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.","status":"published","published":"2023-09-25T18:15:11.013Z","modified":"2026-10-26T18:02:49.590266446Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:39.980321Z"},{"id":"OESA-2023-1575","title":"gawk security update","description":"The gawk package is the GNU implementation of awk. The awk utility interprets a special-purpose programming language that makes it possible to handle simple data-reformatting jobs with just a few lines of code.\r\n\r\nSecurity Fix(es):\r\n\r\nA heap out of bound read issue exists in builtin.c of gawk prior to version 5.1.1. The array \u0026quot;the_args\u0026quot; takes an unsafe index \u0026quot;val\u0026quot;, while it does not validate the index to ensure the index refers to a valid position in the array (e.g., exceedingly large or negative). The vulnerability can cause crash of the software and might be used by attackers to read sensitive information.\r\n\r\nhttps://mail.gnu.org/archive/html/bug-gawk/2022-08/msg00000.html\nhttps://mail.gnu.org/archive/html/bug-gawk/2022-08/msg00023.html\nhttps://fossies.org/linux/gawk/ChangeLog#470 (Line: 470-475)(CVE-2023-4156)","status":"published","published":"2023-09-02T11:06:01Z","modified":"2026-08-18T01:17:52.557987728Z","cvss":[{"version":"3.1","score":3.3,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:52:40.328856Z"},{"id":"UBUNTU-CVE-2023-4156","description":"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.","status":"published","published":"2023-08-08T00:00:00Z","modified":"2026-02-04T03:48:22.803536Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H","level":"high"},{"version":"3.1","score":4.4,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L","level":"medium"}],"updated_at":"2026-11-02T16:54:22.741943Z"},{"id":"CLSA-2024-1712176685","title":"gawk: Fix of CVE-2023-4156","description":"- Fix CVE-2023-4156: builtin.c (format_tree): When collecting positional field\n  widths or precisions, check for wrap around to negative values.","status":"published","published":"2024-04-03T20:38:08Z","modified":"2026-06-01T00:33:03.79418296Z","updated_at":"2026-11-02T15:43:40.88185Z"},{"id":"CLSA-2025-1751619853","title":"gawk: Fix of CVE-2023-4156","description":"- CVE-2023-4156: fix heap out-of-bounds read flaw in builtin.c to prevent\n  potential crash and information leakage","status":"published","published":"2025-07-04T09:04:18Z","modified":"2026-06-01T00:31:06.368742065Z","updated_at":"2026-11-02T15:43:41.66212Z"},{"id":"CLSA-2026-1777030298","title":"gawk: Fix of CVE-2023-4156","description":"- CVE-2023-4156: fix heap out-of-bounds read flaw in builtin.c to prevent\n  potential crash and information leakage","status":"published","published":"2026-04-24T11:31:42Z","modified":"2026-06-01T00:32:48.695776172Z","updated_at":"2026-11-02T15:43:44.384419Z"},{"id":"CLSA-2026-1777888717","title":"gawk: Fix of CVE-2023-4156","description":"- Fix CVE-2023-4156: builtin.c (format_tree): When collecting positional field\n  widths or precisions, check for wrap around to negative values.","status":"published","published":"2026-05-04T10:31:50Z","modified":"2026-06-01T00:33:27.350395495Z","updated_at":"2026-11-02T15:43:44.737408Z"},{"id":"CLSA-2026-1792508988","title":"gawk: Fix of 3 CVEs","description":"- CVE-2023-4156: builtin.c (format_tree): when collecting positional field widths or precisions, check for wrap around to negative values\n- CVE-2026-40469: builtin.c (sub_common): check for overflow in the result buffer size calculation using 64-bit math, failing with a fatal error instead of corrupting the heap on 32-bit builds","status":"published","published":"2026-10-20T16:53:03Z","modified":"2026-10-26T09:31:40.997209332Z","updated_at":"2026-11-02T15:43:54.378946Z"},{"id":"CLSA-2026-1792612080","title":"gawk: Fix of 3 CVEs","description":"- CVE-2023-4156: builtin.c (format_tree): when collecting positional field widths or precisions, check for wrap around to negative values\n- CVE-2026-40469: builtin.c (sub_common): check for overflow in the result buffer size calculation using 64-bit math, failing with a fatal error instead of corrupting the heap on 32-bit builds","status":"published","published":"2026-10-21T19:48:12Z","modified":"2026-10-26T09:31:55.010102369Z","updated_at":"2026-11-02T15:43:54.672859Z"},{"id":"SUSE-SU-2023:3431-1","title":"Security update for gawk","description":"This update for gawk fixes the following issues:\n\n- CVE-2023-4156: Fix a heap out of bound read by validating the index into argument list. (bsc#1214025)\n","status":"published","published":"2023-08-24T11:53:56Z","modified":"2025-05-02T04:35:23.940401Z","updated_at":"2026-11-02T15:53:53.440387Z"},{"id":"SUSE-SU-2023:3440-1","title":"Security update for gawk","description":"This update for gawk fixes the following issues:\n\n- CVE-2023-4156: Fix a heap out of bound read by validating the index into argument list. (bsc#1214025)\n","status":"published","published":"2023-08-28T06:57:26Z","modified":"2026-02-04T04:12:43.888358Z","updated_at":"2026-11-02T15:53:53.440387Z"},{"id":"USN-6373-1","title":"gawk vulnerability","description":"It was discovered that gawk could be made to read out of bounds when\nprocessing certain inputs. If a user or an automated system were tricked\ninto opening a specially crafted input, an attacker could possibly use\nthis issue to cause a denial of service.\n","status":"published","published":"2023-09-14T18:55:29Z","modified":"2026-06-29T13:50:57.402395645Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}