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    CVE-2023-38852

    Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute arbitrary code and cause a denial of service via a crafted XLS file to the unicode_decode_wcstombs function in xlstool.c:266.

    Published:Aug 15, 2023
    Last Modified:Nov 4, 2025
    EPS:Aug 15, 2023
    EPSS Score:0.00898
    CVSS Score:6.5

    Affected Products

    Vendor
    Libxls Project
    Product
    Libxls

    Exploits

    https://github.com/libxls/libxls/issues/124https://github.com/libxls/libxls/issues/124

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-26824 (CVSS 6.5) — libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser.…
    CVE-2026-26825 (CVSS 5.3) — A use-of-uninitialized memory vulnerability exists in libxls 1.6.3 when parsing malformed XLS files. The issue…
    CVE-2023-38855 (CVSS 6.5) — Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute arbitrary code and cause a …
    CVE-2023-38854 (CVSS 6.5) — Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute arbitrary code and cause a …
    CVE-2023-38856 (CVSS 6.5) — Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute arbitrary code and cause a …
    CVE-2023-38851 (CVSS 6.5) — Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute arbitrary code and cause a …
    CVE-2023-38853 (CVSS 6.5) — Buffer Overflow vulnerability in libxlsv.1.6.2 allows a remote attacker to execute arbitrary code and cause a …
    CVE-2021-27836 (CVSS 6.5) — An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows attackers to cause …
    CVE-2020-27819 (CVSS 5.5) — An issue was discovered in libxls before and including 1.6.1 when reading Microsoft Excel files. A NULL pointe…
    CVE-2017-2910 (CVSS 8.8) — An exploitable Out-of-bounds Write vulnerability exists in the xls_addCell function of libxls 2.0. A specially…

    References

    https://github.com/libxls/libxls/issues/124
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQYGEBDBCOWBRHOW44BSSRADUOZBXHUE/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YHBUPYF2NX34HNAWZ3WYHKWU3KWVQUSV/
    https://github.com/libxls/libxls/issues/124
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/JQYGEBDBCOWBRHOW44BSSRADUOZBXHUE/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YHBUPYF2NX34HNAWZ3WYHKWU3KWVQUSV/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/JQYGEBDBCOWBRHOW44BSSRADUOZBXHUE/
    https://lists.fedoraproject.org/archives/list/[email protected]/message/YHBUPYF2NX34HNAWZ3WYHKWU3KWVQUSV/

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High