CVE-2026-112008
libmng through 2.0.3 Heap Buffer Overflow via ORDR Chunk Reader mng_read_ordr
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Passive
What an attacker can affect
- Confidentiality
- None
- Integrity
- Low
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
6.9
libmng through 2.0.3 Heap Buffer Overflow via ORDR Chunk Reader mng_read_ordr
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
- Record
CVE-2026-112008- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Weakness
- CWE-131
- Updated
- 2026-11-02
EUVDEUVD-2026-103461
6.9
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
- Record
EUVD-2026-103461- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-xx2v-hjr6-76fh
6.9
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that...
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
- Record
GHSA-xx2v-hjr6-76fh- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Weakness
- CWE-131
- Updated
- 2026-11-02
NVD
6.9
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
- Record
CVE-2026-112008- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Weakness
- CWE-131
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-112008
6.9
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
- Record
DEBIAN-CVE-2026-112008- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-112008
6.9
libmng through 2.0.3 contains a heap-based buffer overflow vulnerability in mng_read_ordr() that allows attackers to corrupt heap memory because ORDR entry buffers are sized by 5-byte on-wire records instead of 8-byte in-memory entries. Attackers can supply a crafted MNG file with MHDR, DHDR and a multi-record ORDR chunk to applications calling mng_read or mng_readdisplay, writing attacker-controlled data past the allocation and crashing the application.
- Record
UBUNTU-CVE-2026-112008- CVSS 4.0
- 6.9 Medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 6.1 Medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
libmngDebian:12 |
All versions, plus listed versions 1.0.10+dfsg-3.12.0.3+dfsg-12.0.3+dfsg-22.0.3+dfsg-32.0.3+dfsg-42.0.3+dfsg-5 |
None known |
libmngDebian:13 |
All versions, plus listed versions 1.0.10+dfsg-3.12.0.3+dfsg-12.0.3+dfsg-22.0.3+dfsg-32.0.3+dfsg-42.0.3+dfsg-5 |
None known |
libmngDebian:14 |
All versions, plus listed versions 1.0.10+dfsg-3.12.0.3+dfsg-12.0.3+dfsg-22.0.3+dfsg-32.0.3+dfsg-42.0.3+dfsg-5 |
None known |
libmngUbuntu:16.04:LTS |
All versions, plus listed versions 2.0.2-0ubuntu3 |
None known |
libmngUbuntu:18.04:LTS |
All versions, plus listed versions 2.0.2-0ubuntu3 |
None known |
libmngUbuntu:20.04:LTS |
All versions, plus listed versions 2.0.3+dfsg-3 |
None known |
libmngUbuntu:22.04:LTS |
All versions, plus listed versions 2.0.3+dfsg-3 |
None known |
libmngUbuntu:24.04:LTS |
All versions, plus listed versions 2.0.3+dfsg-42.0.3+dfsg-4build1 |
None known |
libmngUbuntu:26.10 |
All versions, plus listed versions 2.0.3+dfsg-5 |
None known |
libmngUbuntu:26.04:LTS |
All versions, plus listed versions 2.0.3+dfsg-4build12.0.3+dfsg-5 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-112008 is a medium vulnerability (CVSS 6.9) in Libmng, published October 18, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.14%, the 3rd percentile. No source names a fixed version.
References
hackmd.io/@haindpwn/libmng-ordr-chunk-store-oob-write
sourceforge.net/projects/libmng/files/libmng-devel/2.0.3
sourceforge.net/projects/libmng
vulncheck.com/advisories/libmng-through-2.0.3-heap-buffer-overflow-via-ordr-chunk-reader-mng-read-ordr
nvd.nist.gov/vuln/detail/CVE-2026-112008
github.com/advisories/GHSA-xx2v-hjr6-76fh
security-tracker.debian.org/tracker/CVE-2026-112008
ubuntu.com/security/CVE-2026-112008
cve.org/CVERecord?id=CVE-2026-112008