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CVE-2026-16517— Libarchive: libarchive: signed integer overflow in archive_write_zip_header

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 10
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libarchive是libarchive团队开源的一款多格式存档和压缩库。 libarchive存在数字错误漏洞，该漏洞源于libarchive ZIP写入器中archive_write_zip_header函数存在有符号整数溢出，当加密启用且文件大小接近INT64_MAX时，加密开销添加导致溢出，可能导致Zip64扩展决断错误或内存损坏。

CVSS 2.9 · Low EPSS 0.08% · P0

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 8

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 0:3.7.7-11.el10_2< * unaffected
Red Hat Red Hat Enterprise Linux 6 any affected
Red Hat Red Hat Enterprise Linux 7 any affected
Red Hat Red Hat Enterprise Linux 8 any unaffected
Red Hat Red Hat Enterprise Linux 9 any unaffected
Red Hat Red Hat Hardened Images 3.8.8-3.1.hum1< * unaffected
Red Hat Red Hat OpenShift Container Platform 4 any affected
any affected
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I. Basic Information for CVE-2026-16517

Vulnerability Information
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Vulnerability Title
Libarchive: libarchive: signed integer overflow in archive_write_zip_header
Source: CVE Program / CVE List V5
Vulnerability Description
A signed integer overflow vulnerability was found in libarchive's ZIP writer. In the archive_write_zip_header function in archive_write_set_format_zip.c, when ZIP encryption is enabled and the entry file size is close to INT64_MAX, the addition of the encryption overhead to the entry size overflows int64_t, resulting in undefined behavior. This could lead to incorrect Zip64 extension decisions or potential memory corruption.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5
Vulnerability Title
libarchive 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libarchive是libarchive团队开源的一款多格式存档和压缩库。 libarchive存在数字错误漏洞，该漏洞源于libarchive ZIP写入器中archive_write_zip_header函数存在有符号整数溢出，当加密启用且文件大小接近INT64_MAX时，加密开销添加导致溢出，可能导致Zip64扩展决断错误或内存损坏。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 10 0:3.7.7-11.el10_2 ~ * cpe:/o:redhat:enterprise_linux:10.2
Red Hat Red Hat Hardened Images 3.8.8-3.1.hum1 ~ * cpe:/a:redhat:hummingbird:1
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4
Red Hat Red Hat OpenShift Container Platform 4 - cpe:/a:redhat:openshift:4

II. Public POCs for CVE-2026-16517

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III. Intelligence Information for CVE-2026-16517

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Vendor Advisories for CVE-2026-16517 (4)

Same Patch Batch · Red Hat · 2026-07-21 · 20 CVEs total

CVE-2026-59851 8.8 HIGH Libssh: libssh: authentication bypass via missing gssapi principal check
CVE-2026-16493 7.8 HIGH Ansible-core: argument injection in ansible-galaxy collection install via git clone (incom
CVE-2026-16445 7.5 HIGH Dracut: dracut: root code execution via dhcp options command injection in networkmanager i
CVE-2026-15927 6.8 MEDIUM Quay: mirror-registry: ssrf: repo-level mirror accepts external_reference without url vali
CVE-2026-15370 6.7 MEDIUM Libssh: libssh: stack buffer overflow in sftp server longname construction
CVE-2026-59843 6.5 MEDIUM Libssh: libssh: denial of service via zero advertised channel packet size
CVE-2026-16461 6.5 MEDIUM Rpcbind: rpcbind: stack buffer overflow in rpcinfo rpcbdump() short-mode version-list form
CVE-2026-59844 6.5 MEDIUM Libssh: libssh: denial of service via oversized sftp read length
CVE-2026-59847 5.9 MEDIUM Libssh: libssh: integrity downgrade via openssl aes-gcm tag verification
CVE-2026-15811 5.8 MEDIUM Kronosnet: kronosnet: encryption key exposure in memory after cryptographic configuration
CVE-2026-59845 5.3 MEDIUM Libssh: libssh: denial of service via unchecked proxycommand fork() failure
CVE-2026-59848 5.3 MEDIUM Libssh: libssh: denial of service via sftp responses with unknown request ids
CVE-2026-15812 4.8 MEDIUM Kronosnet: kronosnet: access control list bypass via link id spoofing on unencrypted dynam
CVE-2026-59850 4.3 MEDIUM Libssh: libssh: use-after-free via data callbacks on closed channels
CVE-2026-12548 4.2 MEDIUM Libsoup: heap out-of-bounds read in libsoup due to integer truncation
CVE-2026-59846 3.9 LOW Libssh: libssh: information disclosure via proxycommand %r username expansion
CVE-2026-59842 3.7 LOW Libssh: libssh: information disclosure via short gssapi curve25519 public key
CVE-2026-12547 3.4 LOW Libsoup: information disclosure in libsoup via soupauthmanager proxy credential leak on pr
CVE-2026-59849 3.1 LOW Libssh: libssh: denial of service via automatic certificate authentication loop

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10
Same vendor: Red Hat
Same weakness: CWE-190

V. Comments for CVE-2026-16517

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