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CVE-2026-4738

GDAL Bundled zlib (inftree9.c) Pointer Offset Optimization Undefined Behavior Allows Heap Corruption or Remote Code Execution

9.4 CriticalFix available

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
Passive

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.26%Up 0.2 points since Mar 24, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.4

GDAL Bundled zlib (inftree9.c) Pointer Offset Optimization Undefined Behavior Allows Heap Corruption or Remote Code Execution

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
CVE-2026-4738
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:L/U:Amber
Weakness
CWE-119
Updated
2026-11-02
EUVDEUVD-2026-14706 9.4

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
EUVD-2026-14706
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:L/U:Amber
Updated
2026-11-02
GitHub AdvisoriesGHSA-hp6p-5qh5-w9fj 9.4

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo...

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
GHSA-hp6p-5qh5-w9fj
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/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:P/AU:Y/R:U/V:C/RE:L/U:Amber
Weakness
CWE-119
Updated
2026-11-02
NVD 9.4

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
CVE-2026-4738
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/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:P/AU:Y/R:U/V:C/RE:L/U:Amber
Weakness
CWE-119
Updated
2026-11-02
OSVALPINE-CVE-2026-4738 9.4

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
ALPINE-CVE-2026-4738
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/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:P/AU:Y/R:U/V:C/RE:L/U:Amber
Updated
2026-11-06
OSV 9.4

GDAL Bundled zlib (inftree9.c) Pointer Offset Optimization Undefined Behavior Allows Heap Corruption or Remote Code Execution

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
CVE-2026-4738
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:L/U:Amber
Weakness
CWE-119
Updated
2026-11-02
Show 5 moreShow less
OSVDEBIAN-CVE-2026-4738 9.4

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎. This issue affects gdal: before 3.11.0.

Record
DEBIAN-CVE-2026-4738
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/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:P/AU:Y/R:U/V:C/RE:L/U:Amber
Updated
2026-11-02
OSVJLSEC-2026-288 9.4

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal...

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
JLSEC-2026-288
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/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:P/AU:Y/R:U/V:C/RE:L/U:Amber
Updated
2026-11-02
OSVUBUNTU-CVE-2026-4738 9.4

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎. This issue affects gdal: before 3.11.0.

Record
UBUNTU-CVE-2026-4738
CVSS 4.0
9.4 CriticalCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/S:P/AU:Y/R:U/V:C/RE:L/U:Amber
Updated
2026-11-02
OSVAZL-104972 No score

CVE-2026-4738 affecting package gdal 3.6.3-2

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
AZL-104972
Updated
2026-11-05
OSVBIT-gdal-2026-4738 No score

GDAL Bundled zlib (inftree9.c) Pointer Offset Optimization Undefined Behavior Allows Heap Corruption or Remote Code Execution

Improper Restriction of Operations within the Bounds of a Memory Buffer vulnerability in OSGeo gdal (frmts/zlib/contrib/infback9 modules). This vulnerability is associated with program files inftree9.C‎.

This issue affects gdal: before 3.11.0.

Record
BIT-gdal-2026-4738
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
zlib
Alpine:v3.21
 before 1.4-r0
1.4-r0
zlib
Alpine:v3.22
 before 1.4-r0
1.4-r0
zlib
Alpine:v3.23
 before 1.4-r0
1.4-r0
zlib
Alpine:v3.24
 before 1.4-r0
1.4-r0
gdal
Azure Linux:3
 through 3.6.3-2 None known
gdal
Bitnami
 before 3.11.0
3.11.0
gdal
Debian:12
 All versions, plus listed versions
3.10.0+dfsg-13.10.0+dfsg-1~exp13.10.0~beta1+dfsg-1~exp13.10.0~rc1+dfsg-1~exp13.10.0~rc2+dfsg-1~exp1
Show 45 moreShow less
3.10.0~rc3+dfsg-1~exp13.10.1+dfsg-13.10.1~rc1+dfsg-1~exp13.10.1~rc2+dfsg-1~exp13.10.2+dfsg-13.10.2~rc1+dfsg-1~exp13.10.3+dfsg-13.10.3+dfsg-23.10.3~rc1+dfsg-1~exp13.11.0+dfsg-1~exp13.11.0~beta1+dfsg-1~exp13.11.0~beta1+dfsg-1~exp23.11.0~rc1+dfsg-1~exp13.11.0~rc1+dfsg-1~exp23.11.0~rc2+dfsg-1~exp13.11.1+dfsg-1~exp13.11.1~rc1+dfsg-1~exp13.11.1~rc2+dfsg-1~exp13.11.2+dfsg-1~exp13.11.2~rc1+dfsg-1~exp13.11.2~rc2+dfsg-1~exp13.11.3+dfsg-13.11.3+dfsg-1~exp13.11.3+dfsg-1~exp23.11.4+dfsg-13.11.4~rc1+dfsg-1~exp13.12.0+dfsg-13.12.0+dfsg-1~exp13.12.0~beta1+dfsg-1~exp13.12.0~rc1+dfsg-1~exp13.12.1+dfsg-13.12.1~rc1+dfsg-1~exp13.12.2+dfsg-13.12.2~rc1+dfsg-1~exp13.12.3+dfsg-13.12.3~rc1+dfsg-1~exp13.12.3~rc2+dfsg-1~exp13.13.0+dfsg-13.13.0+dfsg-1~exp13.13.0~beta1+dfsg-1~exp13.13.0~beta2+dfsg-1~exp13.13.0~rc1+dfsg-1~exp13.13.0~rc2+dfsg-1~exp13.13.1+dfsg-13.13.1~rc1+dfsg-1~exp1
 None known
gdal
Debian:13
 All versions, plus listed versions
3.10.3+dfsg-13.10.3+dfsg-23.11.0+dfsg-1~exp13.11.0~beta1+dfsg-1~exp13.11.0~beta1+dfsg-1~exp2
Show 38 moreShow less
3.11.0~rc1+dfsg-1~exp13.11.0~rc1+dfsg-1~exp23.11.0~rc2+dfsg-1~exp13.11.1+dfsg-1~exp13.11.1~rc1+dfsg-1~exp13.11.1~rc2+dfsg-1~exp13.11.2+dfsg-1~exp13.11.2~rc1+dfsg-1~exp13.11.2~rc2+dfsg-1~exp13.11.3+dfsg-13.11.3+dfsg-1~exp13.11.3+dfsg-1~exp23.11.4+dfsg-13.11.4~rc1+dfsg-1~exp13.12.0+dfsg-13.12.0+dfsg-1~exp13.12.0~beta1+dfsg-1~exp13.12.0~rc1+dfsg-1~exp13.12.1+dfsg-13.12.1~rc1+dfsg-1~exp13.12.2+dfsg-13.12.2~rc1+dfsg-1~exp13.12.3+dfsg-13.12.3~rc1+dfsg-1~exp13.12.3~rc2+dfsg-1~exp13.13.0+dfsg-13.13.0+dfsg-1~exp13.13.0~beta1+dfsg-1~exp13.13.0~beta2+dfsg-1~exp13.13.0~rc1+dfsg-1~exp13.13.0~rc2+dfsg-1~exp13.13.1+dfsg-13.13.1~rc1+dfsg-1~exp13.13.2+dfsg-13.13.2~rc1+dfsg-1~exp13.13.3+dfsg-13.13.3+dfsg-23.13.3~rc1+dfsg-1~exp1
 None known
gdal
Debian:14
 before 3.11.3+dfsg-1, plus listed versions
3.10.3+dfsg-13.10.3+dfsg-23.11.0+dfsg-1~exp13.11.0~beta1+dfsg-1~exp13.11.0~beta1+dfsg-1~exp2
Show 11 moreShow less
3.11.0~rc1+dfsg-1~exp13.11.0~rc1+dfsg-1~exp23.11.0~rc2+dfsg-1~exp13.11.1+dfsg-1~exp13.11.1~rc1+dfsg-1~exp13.11.1~rc2+dfsg-1~exp13.11.2+dfsg-1~exp13.11.2~rc1+dfsg-1~exp13.11.2~rc2+dfsg-1~exp13.11.3+dfsg-1~exp13.11.3+dfsg-1~exp2
3.11.3+dfsg-1
GDAL_jll
Julia
 before 303.1100.0+0
303.1100.0+0
Show 7 moreShow less
Affected packages
PackageAffectedFixed
gdal
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
1.9.0-3.1ubuntu41.9.0-3.1ubuntu61.10.1+dfsg-21.10.1+dfsg-2build11.10.1+dfsg-3
Show 8 moreShow less
1.10.1+dfsg-3build11.10.1+dfsg-3build21.10.1+dfsg-3ubuntu11.10.1+dfsg-3ubuntu21.10.1+dfsg-5ubuntu11.10.1+dfsg-5ubuntu1+esm11.10.1+dfsg-5ubuntu1+esm21.10.1+dfsg-5ubuntu1+esm3
 None known
gdal
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
1.11.2+dfsg-3ubuntu31.11.2+dfsg-3ubuntu41.11.3+dfsg-2build11.11.3+dfsg-2build21.11.3+dfsg-2build3
Show 5 moreShow less
1.11.3+dfsg-31.11.3+dfsg-3build11.11.3+dfsg-3build21.11.3+dfsg-3ubuntu0.1~esm11.11.3+dfsg-3ubuntu0.1~esm2
 None known
gdal
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
2.2.1+dfsg-2build32.2.1+dfsg-2build52.2.2+dfsg-2build12.2.3+dfsg-12.2.3+dfsg-22.2.3+dfsg-2ubuntu0.1~esm1
 None known
gdal
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
2.4.2+dfsg-1build22.4.2+dfsg-1build42.4.2+dfsg-22.4.3+dfsg-13.0.4+dfsg-1
Show 4 moreShow less
3.0.4+dfsg-1build13.0.4+dfsg-1build23.0.4+dfsg-1build33.0.4+dfsg-1ubuntu0.1~esm1
 None known
gdal
Ubuntu:Pro:22.04:LTS
 All versions, plus listed versions
3.2.2+dfsg-3ubuntu23.4.0+dfsg-13.4.1+dfsg-13.4.1+dfsg-1build13.4.1+dfsg-1build33.4.1+dfsg-1build43.4.1+dfsg-1ubuntu0.1~esm1
 None known
gdal
Ubuntu:Pro:24.04:LTS
 All versions, plus listed versions
3.7.1+dfsg-1build13.8.0+dfsg-13.8.1+dfsg-1build13.8.2+dfsg-13.8.3+dfsg-1
Show 4 moreShow less
3.8.4+dfsg-13.8.4+dfsg-3ubuntu23.8.4+dfsg-3ubuntu33.8.4+dfsg-3ubuntu3+esm1
 None known
gdal
Ubuntu:25.10
 All versions, plus listed versions
3.10.2+dfsg-1build33.10.3+dfsg-13.10.3+dfsg-1build13.10.3+dfsg-1build2
 None known

History

History
RecordedChangedSources
affected, aliases, referencesOSV
factsOSV
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-4738 is a critical vulnerability (CVSS 9.4) in Osgeo Gdal, published March 24, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 18th percentile. Fixed in zlib 1.4-r0.

References

This page doesn't list everything

Left out here: 59 versions. The JSON record has them.

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