Medium severity5.5NVD Advisory· Published May 18, 2021· Updated Jun 17, 2026

CVE-2020-23856

Description

Use-after-Free vulnerability in cflow 1.6 in the void call(char *name, int line) function at src/parser.c, which could cause a denial of service via the pointer variable caller->callee.

AI Insight

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

Affected products

GNU/cflow
cpe:2.3:a:gnu:cflow:1.6:*:*:*:*:*:*:*
Fedoraproject/Fedora2 versions
cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*
cflow/cflowdescription
Cflow/cflowllm-create
Range: =1.6

Patches

Vulnerability mechanics

References

github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284nvdExploitThird Party Advisory
lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.htmlnvdExploitMailing ListVendor Advisory
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/nvd
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/nvd

News mentions

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ransomware	0.000