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CVE-2026-57965— Spice-vdagent: integer overflow in udscs_write() leading to heap buffer overflow

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.

SPICE Spice vdagent是SPICE团队的一系列虚拟桌面代理软件。 Spice vdagent存在数字错误漏洞，该漏洞源于整数溢出问题，恶意或受损SPICE主机通过发送特制消息触发堆缓冲区溢出，导致spice-vdagent守护进程崩溃并造成虚拟机拒绝服务。

CVSS 5.1 · Medium EPSS 0.11% · P1

Possible ATT&CK Techniques 1 AI

T1499.002 · Service Exhaustion Flood

Affected Version Matrix 6

VendorProduct Version RangeStatus
Red Hat Red Hat Enterprise Linux 10 any affected
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 affected
any affected
Red Hat Red Hat Enterprise Linux 9 any affected
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I. Basic Information for CVE-2026-57965

Vulnerability Information
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Vulnerability Title
Spice-vdagent: integer overflow in udscs_write() leading to heap buffer overflow
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in spice-vdagent. A malicious or compromised SPICE host can trigger an integer overflow by sending a specially crafted message. This vulnerability can lead to a heap buffer overflow, causing the spice-vdagent daemon to crash and resulting in a Denial of Service (DoS) for the virtual machine. This issue requires the SPICE host to be untrusted or compromised for exploitation.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H
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
Spice vdagent 数字错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
SPICE Spice vdagent是SPICE团队的一系列虚拟桌面代理软件。 Spice vdagent存在数字错误漏洞，该漏洞源于整数溢出问题，恶意或受损SPICE主机通过发送特制消息触发堆缓冲区溢出，导致spice-vdagent守护进程崩溃并造成虚拟机拒绝服务。
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 - cpe:/o:redhat:enterprise_linux:10
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 8 - cpe:/o:redhat:enterprise_linux:8
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9

II. Public POCs for CVE-2026-57965

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III. Intelligence Information for CVE-2026-57965

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Vendor Advisories for CVE-2026-57965 (2)

Same Patch Batch · Red Hat · 2026-06-29 · 7 CVEs total

CVE-2026-12856 8.8 HIGH Vscode-java: vscode: command injection vulnerability in the javadoc hover provider of the
CVE-2026-12912 7.3 HIGH Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image
CVE-2026-13601 7.1 HIGH Yelp: yelp-xsl: overly permissive content security policy in yelp allows host file disclos
CVE-2026-13595 6.8 MEDIUM Util-linux: util-linux: heap use-after-free in libblkid nested partition probing
CVE-2026-13757 6.2 MEDIUM P11-kit: stack exhaustion via unbounded recursion in rpc attribute parsing
CVE-2026-57966 4.4 MEDIUM Spice-vdagent: path traversal in file transfer via unsanitized filename

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-57965

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