mruby - MidnightBSD Security Advisories

CVE-2017-9527 MEDIUM

The mark_context_stack function in gc.c in mruby through 1.2.0 allows attackers to cause a denial of service (heap-based use-after-free and application crash) or possibly have unspecified other impact via a crafted .rb file.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	1.8	5.9

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*
debian	debian_linux	9.0

CVE-2018-10191 HIGH

In versions of mruby up to and including 1.4.0, an integer overflow exists in src/vm.c::mrb_vm_exec() when handling OP_GETUPVAR in the presence of deep scope nesting, resulting in a use-after-free. An attacker that can cause Ruby code to be run can use this to possibly execute arbitrary code.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-190,

Products Affected

Vendor	Product	Version
mruby	mruby	*
debian	debian_linux	9.0

CVE-2018-10199 HIGH

In versions of mruby up to and including 1.4.0, a use-after-free vulnerability exists in src/io.c::File#initilialize_copy(). An attacker that can cause Ruby code to be run can possibly use this to execute arbitrary code.

CVSS 2.0

Severity: HIGH

Problem Type: CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2018-11743 HIGH

The init_copy function in kernel.c in mruby 1.4.1 makes initialize_copy calls for TT_ICLASS objects, which allows attackers to cause a denial of service (mrb_hash_keys uninitialized pointer and application crash) or possibly have unspecified other impact.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-824,

Products Affected

Vendor	Product	Version
mruby	mruby	1.4.1
debian	debian_linux	9.0

CVE-2018-12247 MEDIUM

An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class, related to certain .clone usage, because mrb_obj_clone in kernel.c copies flags other than the MRB_FLAG_IS_FROZEN flag (e.g., the embedded flag).

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	1.4.1

CVE-2018-12248 MEDIUM

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OP_ENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber.

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-125,

Products Affected

Vendor	Product	Version
mruby	mruby	1.4.1

CVE-2018-12249 MEDIUM

An issue was discovered in mruby 1.4.1. There is a NULL pointer dereference in mrb_class_real because "class BasicObject" is not properly supported in class.c.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	1.4.1
debian	debian_linux	9.0

CVE-2018-14337 MEDIUM

The CHECK macro in mrbgems/mruby-sprintf/src/sprintf.c in mruby 1.4.1 contains a signed integer overflow, possibly leading to out-of-bounds memory access because the mrb_str_resize function in string.c does not check for a negative length.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	3.9	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-190,

Products Affected

Vendor	Product	Version
mruby	mruby	1.4.1
debian	debian_linux	9.0

CVE-2020-15866 HIGH

mruby through 2.1.2-rc has a heap-based buffer overflow in the mrb_yield_with_class function in vm.c because of incorrect VM stack handling. It can be triggered via the stack_copy function.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-787,

Products Affected

Vendor	Product	Version
mruby	mruby	*
debian	debian_linux	9.0
mruby	mruby	2.1.2

CVE-2020-36401 MEDIUM

mruby 2.1.2 has a double free in mrb_default_allocf (called from mrb_free and obj_free).

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	1.8	5.9

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-415,

Products Affected

Vendor	Product	Version
mruby	mruby	2.1.2

CVE-2020-6838 HIGH

In mruby 2.1.0, there is a use-after-free in hash_values_at in mrbgems/mruby-hash-ext/src/hash-ext.c.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	2.1.0

CVE-2020-6839 HIGH

In mruby 2.1.0, there is a stack-based buffer overflow in mrb_str_len_to_dbl in string.c.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-787,

Products Affected

Vendor	Product	Version
mruby	mruby	2.1.0

CVE-2020-6840 HIGH

In mruby 2.1.0, there is a use-after-free in hash_slice in mrbgems/mruby-hash-ext/src/hash-ext.c.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	2.1.0

CVE-2021-4110 MEDIUM

mruby is vulnerable to NULL Pointer Dereference

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2021-4188 MEDIUM

mruby is vulnerable to NULL Pointer Dereference

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2021-46020 MEDIUM

An untrusted pointer dereference in mrb_vm_exec() of mruby v3.0.0 can lead to a segmentation fault or application crash.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-119,

Products Affected

Vendor	Product	Version
mruby	mruby	3.0.0

CVE-2021-46023

An Untrusted Pointer Dereference was discovered in function mrb_vm_exec in mruby before 3.1.0-rc. The vulnerability causes a segmentation fault and application crash.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0080 HIGH

mruby is vulnerable to Heap-based Buffer Overflow

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-122,CWE-122,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0240 MEDIUM

mruby is vulnerable to NULL Pointer Dereference

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0326 MEDIUM

NULL Pointer Dereference in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	1.8	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0481 HIGH

NULL Pointer Dereference in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6

CVSS 2.0

Severity: HIGH

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0525 MEDIUM

Out-of-bounds Read in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	3.9	5.2

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-125,CWE-125,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0570 HIGH

Heap-based Buffer Overflow in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-122,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0614 MEDIUM

Use of Out-of-range Pointer Offset in Homebrew mruby prior to 3.2.

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-823,CWE-119,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0623 MEDIUM

Out-of-bounds Read in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	3.9	5.2

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-125,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0630 MEDIUM

Out-of-bounds Read in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.1	HIGH	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H	1.8	5.2

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-125,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0631 HIGH

Heap-based Buffer Overflow in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-122,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0632 MEDIUM

NULL Pointer Dereference in Homebrew mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	1.8	3.6

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0717 MEDIUM

Out-of-bounds Read in GitHub repository mruby/mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	3.9	5.2

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-125,CWE-125,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-0890 HIGH

NULL Pointer Dereference in GitHub repository mruby/mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	5.5	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H	1.8	3.6

CVSS 2.0

Severity: HIGH

Problem Type: CWE-476,CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-1071 MEDIUM

User after free in mrb_vm_exec in GitHub repository mruby/mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	8.2	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H	1.5	6.0

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-416,CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-1106 MEDIUM

use after free in mrb_vm_exec in GitHub repository mruby/mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.1	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	3.9	5.2

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-416,CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-1201 MEDIUM

NULL Pointer Dereference in mrb_vm_exec with super in GitHub repository mruby/mruby prior to 3.2. This vulnerability is capable of making the mruby interpreter crash, thus affecting the availability of the system.

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-476,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-1212 HIGH

Use-After-Free in str_escape in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*
mruby	mruby	3.1.0

CVE-2022-1276 HIGH

Out-of-bounds Read in mrb_get_args in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-125,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-1286 HIGH

heap-buffer-overflow in mrb_vm_exec in mruby/mruby in GitHub repository mruby/mruby prior to 3.2. Possible arbitrary code execution if being exploited.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	9.8	CRITICAL	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	3.9	5.9

CVSS 2.0

Severity: HIGH

Problem Type: CWE-122,CWE-787,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-1427 MEDIUM

Out-of-bounds Read in mrb_obj_is_kind_of in in GitHub repository mruby/mruby prior to 3.2. # Impact: Possible arbitrary code execution if being exploited.

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-125,CWE-125,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2022-1934 MEDIUM

Use After Free in GitHub repository mruby/mruby prior to 3.2.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
nvd@nist.gov	7.8	HIGH	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	1.8	5.9

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-416,CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2025-12875 MEDIUM

A weakness has been identified in mruby 3.4.0. This vulnerability affects the function ary_fill_exec of the file mrbgems/mruby-array-ext/src/array.c. Executing a manipulation of the argument start/length can lead to out-of-bounds write. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. This patch is called 93619f06dd378db6766666b30c08978311c7ec94. It is best practice to apply a patch to resolve this issue.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
cna@vuldb.com	5.3	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	1.8	3.4

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-119,CWE-787,CWE-787,

Products Affected

Vendor	Product	Version
mruby	mruby	3.4.0

CVE-2025-13120 MEDIUM

A vulnerability has been found in mruby up to 3.4.0. This vulnerability affects the function sort_cmp of the file src/array.c. Such manipulation leads to use after free. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is eb398971bfb43c38db3e04528b68ac9a7ce509bc. It is advisable to implement a patch to correct this issue.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
cna@vuldb.com	5.3	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	1.8	3.4

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-119,CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*

CVE-2025-7207 LOW

A vulnerability, which was classified as problematic, was found in mruby up to 3.4.0-rc2. Affected is the function scope_new of the file mrbgems/mruby-compiler/core/codegen.c of the component nregs Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. The exploit has been disclosed to the public and may be used. The name of the patch is 1fdd96104180cc0fb5d3cb086b05ab6458911bb9. It is recommended to apply a patch to fix this issue.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
cna@vuldb.com	3.3	LOW	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L	1.8	1.4

CVSS 2.0

Severity: LOW

Problem Type: CWE-119,CWE-122,CWE-787,

Products Affected

Vendor	Product	Version
mruby	mruby	3.4.0
mruby	mruby	*

CVE-2026-1979 MEDIUM

A flaw has been found in mruby up to 3.4.0. This affects the function mrb_vm_exec of the file src/vm.c of the component JMPNOT-to-JMPIF Optimization. Executing a manipulation can lead to use after free. The attack needs to be launched locally. The exploit has been published and may be used. This patch is called e50f15c1c6e131fa7934355eb02b8173b13df415. It is advisable to implement a patch to correct this issue.

CVSS 3.x

Source	Score	Severity	Vector	Exploitability	Impact
cna@vuldb.com	5.3	MEDIUM	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L	1.8	3.4

CVSS 2.0

Severity: MEDIUM

Problem Type: CWE-119,CWE-416,

Products Affected

Vendor	Product	Version
mruby	mruby	*

Advisories for mruby