Search
Find a vulnerability
Search criteria
6 vulnerabilities found for libredwg by LibreDWG
CVE-2026-62254 (GCVE-0-2026-62254)
Vulnerability from nvd – Published: 2026-10-30 20:36 – Updated: 2026-10-30 22:12
VLAI
EPSS
VEX
Title
LibreDWG: excessive class-decoding reallocation in R13-R2000 DWG parsing
Summary
LibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in `decode_R13_R2000` in `src/decode.c`. The class-decoding loop performs `realloc` on every iteration without a sanity check on `num_classes`. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 21:18 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/LibreDWG/libredwg/security/adv… | x_refsource_CONFIRM |
| https://github.com/LibreDWG/libredwg/issues/1261 | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/commit/9de89… | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/releases/tag/0.14 | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-62254",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-30T21:18:19.876055Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T22:12:55.917Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "libredwg",
"vendor": "LibreDWG",
"versions": [
{
"status": "affected",
"version": "\u003c 0.14"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in `decode_R13_R2000` in `src/decode.c`. The class-decoding loop performs `realloc` on every iteration without a sanity check on `num_classes`. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T20:36:09.037Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-gp83-hcvh-g255",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-gp83-hcvh-g255"
},
{
"name": "https://github.com/LibreDWG/libredwg/issues/1261",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/issues/1261"
},
{
"name": "https://github.com/LibreDWG/libredwg/commit/9de893a2e395ff5ac104a46cca54c5e2cf8f02cf",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/commit/9de893a2e395ff5ac104a46cca54c5e2cf8f02cf"
},
{
"name": "https://github.com/LibreDWG/libredwg/releases/tag/0.14",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/releases/tag/0.14"
}
],
"source": {
"advisory": "GHSA-gp83-hcvh-g255",
"discovery": "UNKNOWN"
},
"title": "LibreDWG: excessive class-decoding reallocation in R13-R2000 DWG parsing"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-62254",
"datePublished": "2026-10-30T20:36:09.037Z",
"dateReserved": "2026-07-13T17:09:57.573Z",
"dateUpdated": "2026-10-30T22:12:55.917Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-62250 (GCVE-0-2026-62250)
Vulnerability from nvd – Published: 2026-10-30 20:37 – Updated: 2026-10-30 22:12
VLAI
EPSS
VEX
Title
LibreDWG: unbounded allocation in pre-R13 DWG entity decoding
Summary
LibreDWG is a free C library to read and write DWG files. Prior to 0.14.8413, a crafted pre-R13 DWG can make `decode_preR13_entities()` in `src/decode.c` enter a nonterminating loop that allocates a new object each iteration. `decode_preR13` in `src/decode_r11.c` computes `size` from the raw file-controlled `entities_start` and `entities_end` header bounds; the callee clamps `end` to `dat->size` but never recalculates `size`. At `end` of input, `bit_read_RC` and `bit_read_RS` stop advancing `dat->byte`, the overflow guard fails because `end` equals `dat->size`, and the no-advance check compares against `oldpos` saved before the loop instead of the previous iteration. This leaves repeated allocation of `dwg->object` entries until allocation fails or the process is OOM-killed, not merely a constant-memory CPU hang. The defect remains after the clamping and no-progress changes associated with the earlier issue 1131. Applications and tools calling `dwg_read_file()` on untrusted files, including `dwg2dxf`, `dwgread` and `dwg2svg`, can suffer denial of service when a user or automated pipeline opens a malformed file; no attacker credentials are required. This issue is fixed in repository nightly version 0.14.8413.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 21:18 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/LibreDWG/libredwg/security/adv… | x_refsource_CONFIRM |
| https://github.com/LibreDWG/libredwg/issues/1131 | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/commit/4e149… | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/releases/tag… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-62250",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-30T21:18:21.594623Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T22:12:48.952Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "libredwg",
"vendor": "LibreDWG",
"versions": [
{
"status": "affected",
"version": "\u003c 0.14.8413"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LibreDWG is a free C library to read and write DWG files. Prior to 0.14.8413, a crafted pre-R13 DWG can make `decode_preR13_entities()` in `src/decode.c` enter a nonterminating loop that allocates a new object each iteration. `decode_preR13` in `src/decode_r11.c` computes `size` from the raw file-controlled `entities_start` and `entities_end` header bounds; the callee clamps `end` to `dat-\u003esize` but never recalculates `size`. At `end` of input, `bit_read_RC` and `bit_read_RS` stop advancing `dat-\u003ebyte`, the overflow guard fails because `end` equals `dat-\u003esize`, and the no-advance check compares against `oldpos` saved before the loop instead of the previous iteration. This leaves repeated allocation of `dwg-\u003eobject` entries until allocation fails or the process is OOM-killed, not merely a constant-memory CPU hang. The defect remains after the clamping and no-progress changes associated with the earlier issue 1131. Applications and tools calling `dwg_read_file()` on untrusted files, including `dwg2dxf`, `dwgread` and `dwg2svg`, can suffer denial of service when a user or automated pipeline opens a malformed file; no attacker credentials are required. This issue is fixed in repository nightly version 0.14.8413."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T20:37:47.927Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-7625-26gc-xqvp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-7625-26gc-xqvp"
},
{
"name": "https://github.com/LibreDWG/libredwg/issues/1131",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/issues/1131"
},
{
"name": "https://github.com/LibreDWG/libredwg/commit/4e14952c43be5b8feff6e54a61af3425d6ca95a4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/commit/4e14952c43be5b8feff6e54a61af3425d6ca95a4"
},
{
"name": "https://github.com/LibreDWG/libredwg/releases/tag/0.14.8413",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/releases/tag/0.14.8413"
}
],
"source": {
"advisory": "GHSA-7625-26gc-xqvp",
"discovery": "UNKNOWN"
},
"title": "LibreDWG: unbounded allocation in pre-R13 DWG entity decoding"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-62250",
"datePublished": "2026-10-30T20:37:47.927Z",
"dateReserved": "2026-07-13T17:09:57.573Z",
"dateUpdated": "2026-10-30T22:12:48.952Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-54610 (GCVE-0-2026-54610)
Vulnerability from nvd – Published: 2026-10-30 20:39 – Updated: 2026-10-30 20:39
VLAI
EPSS
VEX
Title
LibreDWG: const-input mutation and crash in bit_TV_to_utf8 error handling
Summary
LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided `src` buffer despite accepting const input. On an `iconv()` error other than `E2BIG`, the function frees its output buffer and passes the original input alias to `bit_u_expand()`, which expands or shrinks Unicode and multibyte escape sequences in place. If the input is a string literal, read-only mapping, or other immutable buffer, the write can cause a segmentation fault and denial of service; mutable caller-owned input can be unexpectedly modified before being returned. This affects applications that expose the conversion API to untrusted input under those conditions. Direct file-triggered exploitability through normal DWG decode/export paths remains unconfirmed because many TV strings are heap allocated by bit_read_TV(). This issue is fixed in version 0.14.
Severity
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/LibreDWG/libredwg/security/adv… | x_refsource_CONFIRM |
| https://github.com/LibreDWG/libredwg/commit/08c03… | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/releases/tag/0.14 | x_refsource_MISC |
| https://github.com/user-attachments/files/2863109… | x_refsource_MISC |
{
"containers": {
"cna": {
"affected": [
{
"product": "libredwg",
"vendor": "LibreDWG",
"versions": [
{
"status": "affected",
"version": "\u003c 0.14"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided `src` buffer despite accepting const input. On an `iconv()` error other than `E2BIG`, the function frees its output buffer and passes the original input alias to `bit_u_expand()`, which expands or shrinks Unicode and multibyte escape sequences in place. If the input is a string literal, read-only mapping, or other immutable buffer, the write can cause a segmentation fault and denial of service; mutable caller-owned input can be unexpectedly modified before being returned. This affects applications that expose the conversion API to untrusted input under those conditions. Direct file-triggered exploitability through normal DWG decode/export paths remains unconfirmed because many TV strings are heap allocated by bit_read_TV(). This issue is fixed in version 0.14."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 3.3,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-471",
"description": "CWE-471: Modification of Assumed-Immutable Data (MAID)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-703",
"description": "CWE-703: Improper Check or Handling of Exceptional Conditions",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T20:39:19.805Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-5p98-8245-6hxq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-5p98-8245-6hxq"
},
{
"name": "https://github.com/LibreDWG/libredwg/commit/08c034a224a4e9512b1cd62e74b5cf081a4cfa89",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/commit/08c034a224a4e9512b1cd62e74b5cf081a4cfa89"
},
{
"name": "https://github.com/LibreDWG/libredwg/releases/tag/0.14",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/releases/tag/0.14"
},
{
"name": "https://github.com/user-attachments/files/28631091/libredwg-bit-tv-to-utf8-submission.tar.gz",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/user-attachments/files/28631091/libredwg-bit-tv-to-utf8-submission.tar.gz"
}
],
"source": {
"advisory": "GHSA-5p98-8245-6hxq",
"discovery": "UNKNOWN"
},
"title": "LibreDWG: const-input mutation and crash in bit_TV_to_utf8 error handling"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-54610",
"datePublished": "2026-10-30T20:39:19.805Z",
"dateReserved": "2026-06-15T19:45:23.540Z",
"dateUpdated": "2026-10-30T20:39:19.805Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-54610 (GCVE-0-2026-54610)
Vulnerability from cvelistv5 – Published: 2026-10-30 20:39 – Updated: 2026-10-30 20:39
VLAI
EPSS
VEX
Title
LibreDWG: const-input mutation and crash in bit_TV_to_utf8 error handling
Summary
LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided `src` buffer despite accepting const input. On an `iconv()` error other than `E2BIG`, the function frees its output buffer and passes the original input alias to `bit_u_expand()`, which expands or shrinks Unicode and multibyte escape sequences in place. If the input is a string literal, read-only mapping, or other immutable buffer, the write can cause a segmentation fault and denial of service; mutable caller-owned input can be unexpectedly modified before being returned. This affects applications that expose the conversion API to untrusted input under those conditions. Direct file-triggered exploitability through normal DWG decode/export paths remains unconfirmed because many TV strings are heap allocated by bit_read_TV(). This issue is fixed in version 0.14.
Severity
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/LibreDWG/libredwg/security/adv… | x_refsource_CONFIRM |
| https://github.com/LibreDWG/libredwg/commit/08c03… | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/releases/tag/0.14 | x_refsource_MISC |
| https://github.com/user-attachments/files/2863109… | x_refsource_MISC |
{
"containers": {
"cna": {
"affected": [
{
"product": "libredwg",
"vendor": "LibreDWG",
"versions": [
{
"status": "affected",
"version": "\u003c 0.14"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LibreDWG is a free C library to read and write DWG files. Prior to 0.14, `bit_TV_to_utf8()` in `src/bits.c` can write to the caller-provided `src` buffer despite accepting const input. On an `iconv()` error other than `E2BIG`, the function frees its output buffer and passes the original input alias to `bit_u_expand()`, which expands or shrinks Unicode and multibyte escape sequences in place. If the input is a string literal, read-only mapping, or other immutable buffer, the write can cause a segmentation fault and denial of service; mutable caller-owned input can be unexpectedly modified before being returned. This affects applications that expose the conversion API to untrusted input under those conditions. Direct file-triggered exploitability through normal DWG decode/export paths remains unconfirmed because many TV strings are heap allocated by bit_read_TV(). This issue is fixed in version 0.14."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "LOW",
"baseScore": 3.3,
"baseSeverity": "LOW",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-471",
"description": "CWE-471: Modification of Assumed-Immutable Data (MAID)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-703",
"description": "CWE-703: Improper Check or Handling of Exceptional Conditions",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T20:39:19.805Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-5p98-8245-6hxq",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-5p98-8245-6hxq"
},
{
"name": "https://github.com/LibreDWG/libredwg/commit/08c034a224a4e9512b1cd62e74b5cf081a4cfa89",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/commit/08c034a224a4e9512b1cd62e74b5cf081a4cfa89"
},
{
"name": "https://github.com/LibreDWG/libredwg/releases/tag/0.14",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/releases/tag/0.14"
},
{
"name": "https://github.com/user-attachments/files/28631091/libredwg-bit-tv-to-utf8-submission.tar.gz",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/user-attachments/files/28631091/libredwg-bit-tv-to-utf8-submission.tar.gz"
}
],
"source": {
"advisory": "GHSA-5p98-8245-6hxq",
"discovery": "UNKNOWN"
},
"title": "LibreDWG: const-input mutation and crash in bit_TV_to_utf8 error handling"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-54610",
"datePublished": "2026-10-30T20:39:19.805Z",
"dateReserved": "2026-06-15T19:45:23.540Z",
"dateUpdated": "2026-10-30T20:39:19.805Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-62250 (GCVE-0-2026-62250)
Vulnerability from cvelistv5 – Published: 2026-10-30 20:37 – Updated: 2026-10-30 22:12
VLAI
EPSS
VEX
Title
LibreDWG: unbounded allocation in pre-R13 DWG entity decoding
Summary
LibreDWG is a free C library to read and write DWG files. Prior to 0.14.8413, a crafted pre-R13 DWG can make `decode_preR13_entities()` in `src/decode.c` enter a nonterminating loop that allocates a new object each iteration. `decode_preR13` in `src/decode_r11.c` computes `size` from the raw file-controlled `entities_start` and `entities_end` header bounds; the callee clamps `end` to `dat->size` but never recalculates `size`. At `end` of input, `bit_read_RC` and `bit_read_RS` stop advancing `dat->byte`, the overflow guard fails because `end` equals `dat->size`, and the no-advance check compares against `oldpos` saved before the loop instead of the previous iteration. This leaves repeated allocation of `dwg->object` entries until allocation fails or the process is OOM-killed, not merely a constant-memory CPU hang. The defect remains after the clamping and no-progress changes associated with the earlier issue 1131. Applications and tools calling `dwg_read_file()` on untrusted files, including `dwg2dxf`, `dwgread` and `dwg2svg`, can suffer denial of service when a user or automated pipeline opens a malformed file; no attacker credentials are required. This issue is fixed in repository nightly version 0.14.8413.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 21:18 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/LibreDWG/libredwg/security/adv… | x_refsource_CONFIRM |
| https://github.com/LibreDWG/libredwg/issues/1131 | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/commit/4e149… | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/releases/tag… | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-62250",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-30T21:18:21.594623Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T22:12:48.952Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "libredwg",
"vendor": "LibreDWG",
"versions": [
{
"status": "affected",
"version": "\u003c 0.14.8413"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LibreDWG is a free C library to read and write DWG files. Prior to 0.14.8413, a crafted pre-R13 DWG can make `decode_preR13_entities()` in `src/decode.c` enter a nonterminating loop that allocates a new object each iteration. `decode_preR13` in `src/decode_r11.c` computes `size` from the raw file-controlled `entities_start` and `entities_end` header bounds; the callee clamps `end` to `dat-\u003esize` but never recalculates `size`. At `end` of input, `bit_read_RC` and `bit_read_RS` stop advancing `dat-\u003ebyte`, the overflow guard fails because `end` equals `dat-\u003esize`, and the no-advance check compares against `oldpos` saved before the loop instead of the previous iteration. This leaves repeated allocation of `dwg-\u003eobject` entries until allocation fails or the process is OOM-killed, not merely a constant-memory CPU hang. The defect remains after the clamping and no-progress changes associated with the earlier issue 1131. Applications and tools calling `dwg_read_file()` on untrusted files, including `dwg2dxf`, `dwgread` and `dwg2svg`, can suffer denial of service when a user or automated pipeline opens a malformed file; no attacker credentials are required. This issue is fixed in repository nightly version 0.14.8413."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-835",
"description": "CWE-835: Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T20:37:47.927Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-7625-26gc-xqvp",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-7625-26gc-xqvp"
},
{
"name": "https://github.com/LibreDWG/libredwg/issues/1131",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/issues/1131"
},
{
"name": "https://github.com/LibreDWG/libredwg/commit/4e14952c43be5b8feff6e54a61af3425d6ca95a4",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/commit/4e14952c43be5b8feff6e54a61af3425d6ca95a4"
},
{
"name": "https://github.com/LibreDWG/libredwg/releases/tag/0.14.8413",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/releases/tag/0.14.8413"
}
],
"source": {
"advisory": "GHSA-7625-26gc-xqvp",
"discovery": "UNKNOWN"
},
"title": "LibreDWG: unbounded allocation in pre-R13 DWG entity decoding"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-62250",
"datePublished": "2026-10-30T20:37:47.927Z",
"dateReserved": "2026-07-13T17:09:57.573Z",
"dateUpdated": "2026-10-30T22:12:48.952Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-62254 (GCVE-0-2026-62254)
Vulnerability from cvelistv5 – Published: 2026-10-30 20:36 – Updated: 2026-10-30 22:12
VLAI
EPSS
VEX
Title
LibreDWG: excessive class-decoding reallocation in R13-R2000 DWG parsing
Summary
LibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in `decode_R13_R2000` in `src/decode.c`. The class-decoding loop performs `realloc` on every iteration without a sanity check on `num_classes`. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14.
Severity
5.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-30 21:18 UTC
CWE
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/LibreDWG/libredwg/security/adv… | x_refsource_CONFIRM |
| https://github.com/LibreDWG/libredwg/issues/1261 | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/commit/9de89… | x_refsource_MISC |
| https://github.com/LibreDWG/libredwg/releases/tag/0.14 | x_refsource_MISC |
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-62254",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-30T21:18:19.876055Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T22:12:55.917Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "libredwg",
"vendor": "LibreDWG",
"versions": [
{
"status": "affected",
"version": "\u003c 0.14"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "LibreDWG is a free C library to read and write DWG files. Prior to 0.14, a specially crafted R13-R2000 DWG can trigger algorithmic resource exhaustion in `decode_R13_R2000` in `src/decode.c`. The class-decoding loop performs `realloc` on every iteration without a sanity check on `num_classes`. Manipulating that field forces an extremely slow allocation loop and denial of service when the file is parsed. Running the parser in a sandbox with memory limits is a workaround rather than a remediation. This issue is fixed in version 0.14."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-400",
"description": "CWE-400: Uncontrolled Resource Consumption",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-789",
"description": "CWE-789: Memory Allocation with Excessive Size Value",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-10-30T20:36:09.037Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-gp83-hcvh-g255",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/LibreDWG/libredwg/security/advisories/GHSA-gp83-hcvh-g255"
},
{
"name": "https://github.com/LibreDWG/libredwg/issues/1261",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/issues/1261"
},
{
"name": "https://github.com/LibreDWG/libredwg/commit/9de893a2e395ff5ac104a46cca54c5e2cf8f02cf",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/commit/9de893a2e395ff5ac104a46cca54c5e2cf8f02cf"
},
{
"name": "https://github.com/LibreDWG/libredwg/releases/tag/0.14",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/LibreDWG/libredwg/releases/tag/0.14"
}
],
"source": {
"advisory": "GHSA-gp83-hcvh-g255",
"discovery": "UNKNOWN"
},
"title": "LibreDWG: excessive class-decoding reallocation in R13-R2000 DWG parsing"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-62254",
"datePublished": "2026-10-30T20:36:09.037Z",
"dateReserved": "2026-07-13T17:09:57.573Z",
"dateUpdated": "2026-10-30T22:12:55.917Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}