High severity7.5NVD Advisory· Published Mar 19, 2021· Updated Jun 17, 2026

CVE-2021-28831

Description

decompress_gunzip.c in BusyBox through 1.32.1 mishandles the error bit on the huft_build result pointer, with a resultant invalid free or segmentation fault, via malformed gzip data.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Busybox/Busybox2 versions
cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:busybox:busybox:*:*:*:*:*:*:*:*range: >=1.32.0,<=1.32.1
- (no CPE)range: <=1.32.1
Debian/linux
cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
Fedoraproject/Fedora3 versions
cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
BusyBox/BusyBoxdescription
NetApp/NetAppllm-fuzzy
osv-coords47 versions
pkg:rpm/opensuse/busybox&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/busybox&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/busybox&distro=openSUSE%20Leap%2015.4 pkg:rpm/opensuse/busybox&distro=openSUSE%20Tumbleweed pkg:rpm/opensuse/busybox-static&distro=openSUSE%20Leap%2015.2 pkg:rpm/opensuse/busybox-static&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/virtualbox&distro=openSUSE%20Leap%2015.3 pkg:rpm/opensuse/virtualbox-kmp&distro=openSUSE%20Leap%2015.3 pkg:rpm/suse/busybox&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/busybox&distro=SUSE%20Enterprise%20Storage%207 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-ESPOS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP2-LTSS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-ESPOS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015-LTSS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP4 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Real%20Time%2015%20SP2 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP2-BCL pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP3-BCL pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP4-LTSS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2012%20SP5 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-BCL pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP2-LTSS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%2015-LTSS pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP4 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2012%20SP5 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1 pkg:rpm/suse/busybox&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP2 pkg:rpm/suse/busybox&distro=SUSE%20Manager%20Proxy%204.1 pkg:rpm/suse/busybox&distro=SUSE%20Manager%20Retail%20Branch%20Server%204.1 pkg:rpm/suse/busybox&distro=SUSE%20Manager%20Server%204.1 pkg:rpm/suse/busybox&distro=SUSE%20OpenStack%20Cloud%209 pkg:rpm/suse/busybox&distro=SUSE%20OpenStack%20Cloud%20Crowbar%209 pkg:rpm/suse/busybox-static&distro=SUSE%20Enterprise%20Storage%206 pkg:rpm/suse/busybox-static&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-ESPOS pkg:rpm/suse/busybox-static&distro=SUSE%20Linux%20Enterprise%20High%20Performance%20Computing%2015%20SP1-LTSS pkg:rpm/suse/busybox-static&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP2 pkg:rpm/suse/busybox-static&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP3 pkg:rpm/suse/busybox-static&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-BCL pkg:rpm/suse/busybox-static&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP1-LTSS pkg:rpm/suse/busybox-static&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP1
< 1.26.2-lp152.5.3.1+ 46 more
- (no CPE)range: < 1.26.2-lp152.5.3.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.35.0-150400.3.3.1
- (no CPE)range: < 1.35.0-1.1
- (no CPE)range: < 1.26.2-lp152.5.3.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 6.1.34-lp153.2.27.2
- (no CPE)range: < 6.1.34-lp153.2.27.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.35.0-150400.3.3.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.34.1-4.9.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.35.0-4.3.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1
- (no CPE)range: < 1.26.2-4.5.1

Patches

Vulnerability mechanics

References

git.busybox.net/busybox/commit/nvdMailing ListPatchVendor Advisory
lists.debian.org/debian-lts-announce/2021/04/msg00001.htmlnvdMailing ListThird Party Advisory
security.gentoo.org/glsa/202105-09nvdThird Party Advisory
lists.debian.org/debian-lts-announce/2025/01/msg00012.htmlnvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3UDQGJRECXFS5EZVDH2OI45FMO436AC4/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7ZIFKPRR32ZYA3WAA2NXFA3QHHOU6FJ/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZASBW7QRRLY5V2R44MQ4QQM4CZIDHM2U/nvd
security.netapp.com/advisory/ntap-20250509-0005/nvd

News mentions

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cvss	0.488
epss	0.002
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000