High severity7.5NVD Advisory· Published Mar 24, 2023· Updated Jun 17, 2026

CVE-2021-43312

Description

A heap-based buffer overflow was discovered in upx, during the variable 'bucket' points to an inaccessible address. The issue is being triggered in the function PackLinuxElf64::invert_pt_dynamic at p_lx_elf.cpp:5239.

AI Insight

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

Affected products

Upx/Upx3 versions
cpe:2.3:a:upx:upx:*:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:a:upx:upx:*:*:*:*:*:*:*:*range: <4.0.0
- (no CPE)
- (no CPE)
osv-coords2 versions
pkg:rpm/opensuse/upx&distro=openSUSE%20Leap%2015.4 pkg:rpm/suse/upx&distro=SUSE%20Package%20Hub%2015%20SP4
< 4.0.2-bp154.4.6.1+ 1 more
- (no CPE)range: < 4.0.2-bp154.4.6.1
- (no CPE)range: < 4.0.2-bp154.4.6.1

Patches

Vulnerability mechanics

References

github.com/upx/upx/issues/379nvdExploitIssue TrackingPatch

News mentions

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