GDAL 3.3.0 through 3.4.0 has a heap-based buffer overflow in PCIDSK::CPCIDSKFile::ReadFromFile (called from PCIDSK::CPCIDSKSegment::ReadFro…

published 2021-12-31 4 y ago modified 2026-09-08 2 mo ago also BIT-gdal-2021-45943 , EUVD-2022-0111 , PYSEC-2022-43065

cvss: 5.5; version 3.1, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.5%; EPSS 1.5% chance of exploitation in 30 days, percentile 75%
public exploits: 0; none known

GDAL 3.3.0 through 3.4.0 has a heap-based buffer overflow in PCIDSK::CPCIDSKFile::ReadFromFile (called from PCIDSK::CPCIDSKSegment::ReadFromFile and PCIDSK::CPCIDSKBinarySegment::CPCIDSKBinarySegment).

Patch / fix

fixed in 2 distros 1 links 4

bitnami gdal 3.4.1
pypi gdal 3.4.1

gdal Debian 14, Debian 13, Debian 12 3.4.1+dfsg-1

debian advisories DEBIAN-CVE-2021-45943

github.com/OSGeo/gdal@1ca6a3e commit
github.com/OSGeo/gdal#4944 pull request
bugs.chromium.org/p/oss-fuzz/issues/detail?id=41993 advisory
oracle.com/security-alerts/cpujul2022.html advisory

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2021-45943 updated 2025-11-21 cvss 5.5

gdal: heap-based buffer overflow in PCIDSK::CPCIDSKFile::ReadFromFile

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

1.54% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/OSGeo/gdal/pull/4944 referenced PoC, tagged "exploit" by a source, unverified
bugs.chromium.org https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=41993 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD	2.0	4.3	AV:N/AC:M/Au:N/C:N/I:N/A:P
OSV	3.1	5.5	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
bitnami	gdal	>=3.3.0, <3.4.1	3.4.1
pypi	gdal	>=3.3.0, <3.4.1	3.4.1

Classification

Weakness

CWE-787 Out-of-bounds Write

References

github.com /OSGeo/gdal/commit/1ca6a3e5168c200763fa46d8aa7e698d0b757e7e
patch, third-party-advisory, advisory
github.com /OSGeo/gdal/pull/4944
exploit, patch, third-party-advisory, advisory, web
bugs.chromium.org /p/oss-fuzz/issues/detail?id=41993
exploit, issue-tracking, mailing-list, patch, third-party-advisory, advisory, web
oracle.com /security-alerts/cpujul2022.html
patch, third-party-advisory, advisory, web
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/JBPJGXY7IYY65NVJBLP3RONXE7ZBVCNU/
vendor-advisory, web
lists.fedoraproject.org /archives/list/package-announce%40lists.fedoraproject.org/message/P23E4DEHY5FJCR5VJ46I6TO32DT7Y3T4/
vendor-advisory, web
debian.org /security/2022/dsa-5239
vendor-advisory, third-party-advisory, advisory
security.gentoo.org /glsa/202210-15
vendor-advisory, third-party-advisory, advisory
github.com /google/oss-fuzz-vulns/blob/main/vulns/gdal/OSV-2021-1651.yaml
third-party-advisory, advisory, web
lists.debian.org /debian-lts-announce/2022/01/msg00004.html
mailing-list, third-party-advisory, advisory, web
lists.debian.org /debian-lts-announce/2022/09/msg00040.html
mailing-list, third-party-advisory, advisory, web
nvd.nist.gov /vuln/detail/CVE-2021-45943
web

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary