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CVE-2020-23856

MEDIUM
5.5
CVSS Score
Published: May 18, 2021 at 02:41 PM UTC
Updated: June 17, 2026 at 03:05 AM UTC
2 products affected across 2 vendorsFedoraCflow

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

References (4)

x_refsource_MISCExploitThird Party Advisory
Source: [email protected]
https://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/
Vendor Advisoryx_refsource_FEDORA
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/
x_refsource_MISCExploitMailing ListVendor Advisory
Source: [email protected]
https://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.html

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-416

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