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CVE-2025-49176— Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in big requests extension

Quick assessment

Affected

X.Org xwayland

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.

X.org Big Requests是X.org基金会的一个扩展软件。 X.org Big Requests存在输入验证错误漏洞，该漏洞源于请求长度检查不当，可能导致整数溢出和绕过大小检查。

CVSS 7.3 · High EPSS 0.36% · P27 Updated Jul 02, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 47

Vendor	Product	Version Range	Status
Red Hat	Red Hat Enterprise Linux 10	`0:24.1.5-4.el10_0< *`	unaffected
Red Hat	Red Hat Enterprise Linux 6	`any`	affected
Red Hat	Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION	`0:1.1.0-25.el6_10.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	`0:1.20.4-32.el7_9< *`	unaffected
		`0:1.8.0-36.el7_9.2< *`	unaffected
Red Hat	Red Hat Enterprise Linux 7.7 Advanced Update Support	`0:1.8.0-17.el7_7.1< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8	`0:1.20.11-26.el8_10< *`	unaffected
		`0:21.1.3-18.el8_10< *`	unaffected
		`0:1.15.0-7.el8_10< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	`0:1.9.0-15.el8_2.14< *`	unaffected
		`0:1.20.6-4.el8_2< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	`0:1.20.10-2.el8_4< *`	unaffected
		`0:1.11.0-8.el8_4.13< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	`0:1.20.10-2.el8_4< *`	unaffected
		`0:1.11.0-8.el8_4.13< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	`0:1.12.0-6.el8_6.14< *`	unaffected
		`0:21.1.3-2.el8_6.4< *`	unaffected
		`0:1.20.11-5.el8_6.3< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	`0:1.12.0-6.el8_6.14< *`	unaffected
		`0:21.1.3-2.el8_6.4< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	`0:1.12.0-6.el8_6.14< *`	unaffected
		`0:21.1.3-2.el8_6.4< *`	unaffected
		`0:1.20.11-5.el8_6.3< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	`0:1.12.0-6.el8_6.14< *`	unaffected
		`0:21.1.3-2.el8_6.4< *`	unaffected
		`0:1.20.11-5.el8_6.3< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On	`0:1.20.11-16.el8_8< *`	unaffected
		`0:21.1.3-11.el8_8< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	`0:1.20.11-16.el8_8< *`	unaffected
		`0:1.12.0-15.el8_8.14< *`	unaffected
		`0:21.1.3-11.el8_8< *`	unaffected
Red Hat	Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions	`0:1.20.11-16.el8_8< *`	unaffected
		`0:1.12.0-15.el8_8.14< *`	unaffected
		`0:21.1.3-11.el8_8< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9	`0:1.20.11-31.el9_6< *`	unaffected
		`0:23.2.7-4.el9_6< *`	unaffected
		`0:1.14.1-8.el9_6< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions	`0:21.1.3-3.el9_0< *`	unaffected
		`0:1.20.11-11.el9_0< *`	unaffected
		`0:1.11.0-22.el9_0.15< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	`0:21.1.3-8.el9_2< *`	unaffected
		`0:1.20.11-18.el9_2< *`	unaffected
		`0:1.12.0-14.el9_2.12< *`	unaffected
Red Hat	Red Hat Enterprise Linux 9.4 Extended Update Support	`0:22.1.9-6.el9_4< *`	unaffected
		`0:1.20.11-26.el9_4< *`	unaffected
		`0:1.13.1-8.el9_4.7< *`	unaffected
X.Org	xwayland	`< 24.1.7`	affected

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I. Basic Information for CVE-2025-49176

Vulnerability Information

Have questions about the vulnerability? See if Shenlong's analysis helps!

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title

Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in big requests extension

Source: CVE Program / CVE List V5

Vulnerability Description

A flaw was found in the Big Requests extension. The request length is multiplied by 4 before checking against the maximum allowed size, potentially causing an integer overflow and bypassing the size check.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/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

X.org Big Requests 输入验证错误漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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
X.Org	xwayland	0 ~ 24.1.7	-
Red Hat	Red Hat Enterprise Linux 10	0:24.1.5-4.el10_0 ~ *	`cpe:/o:redhat:enterprise_linux:10.0`
Red Hat	Red Hat Enterprise Linux 6 Extended Lifecycle Support - EXTENSION	0:1.1.0-25.el6_10.1 ~ *	`cpe:/o:redhat:rhel_els:6`
Red Hat	Red Hat Enterprise Linux 7.7 Advanced Update Support	0:1.8.0-17.el7_7.1 ~ *	`cpe:/o:redhat:rhel_aus:7.7::server`
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	0:1.20.4-32.el7_9 ~ *	`cpe:/o:redhat:rhel_els:7`
Red Hat	Red Hat Enterprise Linux 7 Extended Lifecycle Support	0:1.8.0-36.el7_9.2 ~ *	`cpe:/o:redhat:rhel_els:7`
Red Hat	Red Hat Enterprise Linux 8	0:1.20.11-26.el8_10 ~ *	`cpe:/a:redhat:enterprise_linux:8::appstream`
Red Hat	Red Hat Enterprise Linux 8	0:21.1.3-18.el8_10 ~ *	`cpe:/a:redhat:enterprise_linux:8::appstream`
Red Hat	Red Hat Enterprise Linux 8	0:1.15.0-7.el8_10 ~ *	`cpe:/a:redhat:enterprise_linux:8::appstream`
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	0:1.9.0-15.el8_2.14 ~ *	`cpe:/a:redhat:rhel_aus:8.2::appstream`
Red Hat	Red Hat Enterprise Linux 8.2 Advanced Update Support	0:1.20.6-4.el8_2 ~ *	`cpe:/a:redhat:rhel_aus:8.2::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	0:1.20.10-2.el8_4 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support	0:1.11.0-8.el8_4.13 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	0:1.20.10-2.el8_4 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On	0:1.11.0-8.el8_4.13 ~ *	`cpe:/a:redhat:rhel_aus:8.4::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	0:1.12.0-6.el8_6.14 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	0:21.1.3-2.el8_6.4 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	0:1.20.11-5.el8_6.3 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	0:1.12.0-6.el8_6.14 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	0:21.1.3-2.el8_6.4 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	0:1.12.0-6.el8_6.14 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	0:21.1.3-2.el8_6.4 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Telecommunications Update Service	0:1.20.11-5.el8_6.3 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	0:1.12.0-6.el8_6.14 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	0:21.1.3-2.el8_6.4 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions	0:1.20.11-5.el8_6.3 ~ *	`cpe:/a:redhat:rhel_aus:8.6::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On	0:1.20.11-16.el8_8 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support Long-Life Add-On	0:21.1.3-11.el8_8 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	0:1.20.11-16.el8_8 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`
Red Hat	Red Hat Enterprise Linux 8.8 Telecommunications Update Service	0:1.12.0-15.el8_8.14 ~ *	`cpe:/a:redhat:rhel_e4s:8.8::appstream`

II. Public POCs for CVE-2025-49176

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2025-49176

请登录查看更多情报信息。

Vendor Advisories for CVE-2025-49176 (29)

🔗 2369954 – (CVE-2025-49176) CVE-2025-49176 xorg-x11-server-Xwayland: xorg-x11-server: tigervnc: Integer Overflow in Big Requests Extension Read full article issue-tracking x_refsource_REDHAT
🔗 RHSA-2025:9306 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:9303 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:9392 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:9305 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:9304 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:9964 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10377 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10348 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10350 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10258 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10351 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10342 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10410 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10344 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10370 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10376 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10356 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10360 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10375 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10349 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10346 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10378 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10355 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10352 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10343 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10347 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10381 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT
🔗 RHSA-2025:10374 - Security Advisory - Red Hat Customer Portal Read full article vendor-advisory x_refsource_REDHAT

Other References for CVE-2025-49176 (3)

https://www.cve.org/CVERecord?id=CVE-2025-49176

Same Patch Batch · X.Org · 2025-06-17 · 6 CVEs total

CVE-2025-49180	7.8 HIGH	Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x resize, rotate
CVE-2025-49179	7.3 HIGH	Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in x record extensio
CVE-2025-49175	6.1 MEDIUM	Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: out-of-bounds read in x rendering ext
CVE-2025-49177	6.1 MEDIUM	Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: data leak in xfixes extension's xfixe
CVE-2025-49178	5.5 MEDIUM	Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: unprocessed client request due to byt

IV. Related Vulnerabilities

Same product: xwayland

Same vendor: X.Org

Same weakness: CWE-190

V. Comments for CVE-2025-49176

No comments yet

Goal Reached Thanks to every supporter — we hit 100%!

CVE-2025-49176— Xorg-x11-server-xwayland: xorg-x11-server: tigervnc: integer overflow in big requests extension

Quick assessment

Possible ATT&CK Techniques 1 AI

Affected Version Matrix 47

I. Basic Information for CVE-2025-49176

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2025-49176

III. Intelligence Information for CVE-2025-49176

Vendor Advisories for CVE-2025-49176 (29)

Other References for CVE-2025-49176 (3)

Same Patch Batch · X.Org · 2025-06-17 · 6 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2025-49176

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