CVE-2023-6780Medium· 5.3▾ TwilightPoC availableAn integer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a very long message, leading to an…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 29.2 · likelihood 0.5 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
2.7%
An integer overflow was found in the __vsyslog_internal function of the glibc library. This function is called by the syslog and vsyslog functions. This issue occurs when these functions are called with a very long message, leading to an incorrect calculation of the buffer size to store the message, resulting in undefined behavior. This issue affects glibc 2.37 and newer.
glibccompat-glibcglibccompat-glibcglibcglibcglibcglibc (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
CVE-2023-6246High· 8.4Glibc: heap-based buffer overflow in __vsyslog_internal()
CVE-2023-6779High· 8.2Glibc: off-by-one heap-based buffer overflow in __vsyslog_internal()
CVE-2025-0395Medium· 6.2When the assert() function in the GNU C Library versions 2.13 to 2.40 fails, it does not allocate enough space for the assertion failure message string and size information, which may lead to a buffer overflow if the message string size …
CVE-2023-5156High· 7.5A flaw was found in the GNU C Library
CVE-2024-2961High· 7.3The iconv() function in the GNU C Library versions 2.39 and older may overflow the output buffer passed to it by up to 4 bytes when converting strings to the ISO-2022-CN-EXT character set, which may be used to crash an application or ove…
CVE-2023-4911High· 7.8A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable