CVE-2025-27363VulnerabilityPublished 29 May 2025Updated 21 Aug 2026

Red Hat Security Advisory: mingw-freetype and spice-client-win security update

Affects Red HatSource GCVE Database

Mentioned vulnerabilities

Exploited in the wild · KEV due 27 May 2025 · 27% EPSS : upgrade to 8.10.1 now.

Data as of 25 Oct 2026, 19:02 UTC

Exploitation

Actively exploited

High severity · No CVSS score from NVD or the CNA

KEV deadline: 27 May 2025 US federal agencies must patch by this date; a sensible deadline for everyone else.
EPSS: 27.7% chance of exploitation in 30 days – higher than 98% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in 8.10.1

Exploitation evidence

t = 0 is the CVE’s publication on cve.org

Disclosed: evidence found.
CVE published 29 May 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: evidence found.
Listed in CISA KEV 23 days before disclosure
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

Added to CISA KEV (opens in a new tab)
exploitation confirmed
2025-05-06, 23 days before disclosure
KEV remediation due
US federal deadline
2025-05-27, 2 days before disclosure
CVE published
on cve.org
2025-05-2906:42Z, t = 0

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CISA KEV (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2026-10-25.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Red Hat to 8.10.1.

Affected software

Product	Affected	Fixed in
Red Hat Product Security Red Hat	Affected >=8.0.0 <8.10.1	Fixed in 8.10.1

Description

This Red Hat security advisory addresses multiple vulnerabilities in the mingw-freetype library and libsoup components affecting Red Hat Enterprise Linux 8. The issues include out-of-bounds writes, integer overflows, heap buffer overflows, null pointer dereferences, double frees, and denial of service conditions. These vulnerabilities impact font parsing and HTTP request handling functionality. The advisory rates the overall security impact as Important and provides updates to mitigate these issues.

Impact

The vulnerabilities collectively could allow attackers to cause out-of-bounds memory writes, heap buffer overflows, null pointer dereferences, double frees, and denial of service conditions. This may result in application crashes, potential memory corruption, or denial of service in affected components. The advisory does not confirm active exploitation in the wild. The impact severity is rated as Important by Red Hat.

Mitigation

Red Hat has released updated packages addressing these vulnerabilities as detailed in advisory RHSA-2025:8292. Users should apply the provided security updates for mingw-freetype and libsoup on Red Hat Enterprise Linux 8 systems. For detailed update instructions, refer to https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.

Summary

The advisory covers a set of security fixes for mingw-freetype and libsoup libraries in Red Hat Enterprise Linux 8. Key vulnerabilities include an out-of-bounds write in freetype when parsing TrueType GX and variable font files (CVE-2025-27363), multiple heap buffer overflows and integer overflows in libsoup's HTTP content sniffing and header parsing functions (CVE-2025-32050, CVE-2025-32052, CVE-2025-32053, CVE-2025-32906), denial of service via overlapping HTTP Range headers (CVE-2025-32907), null pointer dereferences in libsoup's content sniffer and digest authentication code (CVE-2025-32909, CVE-2025-32910, CVE-2025-32913), and a double free vulnerability in libsoup message header handling (CVE-2025-32911). These vulnerabilities could lead to memory corruption, crashes, or denial of service. The advisory references Red Hat's errata RHSA-2025:8292 for detailed patch information.

CWE-787Out-of-bounds Write (opens in a new tab)
Base weaknessLikelihood of exploit: HighCWE Top 25 (2025): #5
The product writes data past the end, or before the beginning, of the intended buffer.
Requirements · Language Selection
Use a language that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
Operation · Build and Compilation · Environment Hardening
Use automatic buffer overflow detection mechanisms that are offered by certain compilers or compiler extensions. Examples include: the Microsoft Visual Studio /GS flag, Fedora/Red Hat FORTIFY_SOURCE GCC flag, StackGuard, and ProPolice, which provide various mechanisms including canary-based detection and range/index…
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-127Buffer Under-read (opens in a new tab)
Variant weakness
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations prior to the targeted buffer.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-126Buffer Over-read (opens in a new tab)
Variant weakness
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-125Out-of-bounds Read (opens in a new tab)
Base weaknessCWE Top 25 (2025): #8
The product reads data past the end, or before the beginning, of the intended buffer.
Implementation · Input Validation
Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
Architecture and Design · Language Selection
Use a language that provides appropriate memory abstractions.
OWASP Cheat Sheets
XML Security (opens in a new tab)
Mass Assignment (opens in a new tab)
OWASP ASVS 4.0.3
V13.3.1 (opens in a new tab)
V5.1.4 (opens in a new tab)
V5.1.3 (opens in a new tab)
Attack patterns
Overread Buffers (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-1050Excessive Platform Resource Consumption within a Loop (opens in a new tab)
Base weakness
The product has a loop body or loop condition that contains a control element that directly or indirectly consumes platform resources, e.g. messaging, sessions, locks, or file descriptors.
OWASP Cheat Sheets
File Upload (opens in a new tab)
OWASP ASVS 4.0.3
V12.1.1 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-476NULL Pointer Dereference (opens in a new tab)
Base weaknessLikelihood of exploit: MediumCWE Top 25 (2025): #13OWASP Top 10 A10:2025: Mishandling of Exceptional Conditions (opens in a new tab)
The product dereferences a pointer that it expects to be valid but is NULL.
Implementation
For any pointers that could have been modified or provided from a function that can return NULL, check the pointer for NULL before use. When working with a multithreaded or otherwise asynchronous environment, ensure that proper locking APIs are used to lock before the check, and unlock when it has finished.
Requirements
Select a programming language that is not susceptible to these issues.
Implementation
Check the results of all functions that return a value and verify that the value is non-null before acting upon it.
OWASP Cheat Sheets
Logging (opens in a new tab)
Error Handling (opens in a new tab)
OWASP ASVS 4.0.3
V11.1.7 (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).
CWE-590Free of Memory not on the Heap (opens in a new tab)
Variant weakness
The product calls free() on a pointer to memory that was not allocated using associated heap allocation functions such as malloc(), calloc(), or realloc().
Implementation
Only free pointers that you have called malloc on previously. This is the recommended solution. Keep track of which pointers point at the beginning of valid chunks and free them only once.
Implementation
Before freeing a pointer, the programmer should make sure that the pointer was previously allocated on the heap and that the memory belongs to the programmer. Freeing an unallocated pointer will cause undefined behavior in the program.
Architecture and Design · Libraries or Frameworks
Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

Timeline

What to do

Affected software

Description

AI analysisMachine-generated, updated 21 Aug 2026, 15:48 UTC

WeaknessesCWE-787, CWE-127, CWE-126 +4

Technical details

References

Community reviews

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