Vulnerability-Lookup

RHSA-2026:7677

Vulnerability from csaf_redhat - Published: 2026-04-13 02:27 - Updated: 2026-04-13 08:42

Summary

Red Hat Security Advisory: fontforge security update

Severity

Important

Notes

Topic: An update for fontforge is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Details: FontForge is a font editor for outline and bitmap fonts. It supports a range of font formats, including PostScript (ASCII and binary Type 1, some Type 3 and Type 0), TrueType, OpenType (Type2) and CID-keyed fonts. Security Fix(es): * fontforge: FontForge: Remote Code Execution via heap-based buffer overflow in BMP file parsing (CVE-2025-15279) * fontforge: FontForge: Remote Code Execution via Use-After-Free in SFD file parsing (CVE-2025-15269) * fontforge: FontForge: Arbitrary code execution via SFD file parsing buffer overflow (CVE-2025-15275) * fontforge: FontForge: Remote Code Execution via malicious SFD file parsing (CVE-2025-15270) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.

CVE-2025-15269

A flaw was found in FontForge. This use-after-free vulnerability, occurring during the parsing of SFD (Spline Font Database) files, allows a remote attacker to execute arbitrary code. Successful exploitation requires user interaction, such as opening a specially crafted malicious file or visiting a malicious web page. This can lead to complete control over the affected system.

8.8 (High)


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

CWE-416 - Use After Free

Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 https://access.redhat.com/errata/RHSA-2026:7677

Workaround To mitigate this issue, users should avoid opening untrusted SFD files or visiting malicious web pages. Exercise caution with content from unknown or suspicious sources to prevent exploitation of this vulnerability.

CVE-2025-15270

A flaw was found in FontForge. This vulnerability allows a remote attacker to execute arbitrary code by tricking a user into opening a specially crafted SFD (Spline Font Database) file. The issue stems from improper validation of array indexes during SFD file parsing, which can lead to writing data beyond the allocated memory boundary. Successful exploitation results in arbitrary code execution in the context of the current user.

8.8 (High)


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

CWE-129 - Improper Validation of Array Index

Workaround To mitigate this issue, users should avoid opening untrusted SFD (Spline Font Database) files with FontForge. If FontForge is not required, consider removing the `fontforge` package to eliminate the attack surface. To remove the package on Red Hat Enterprise Linux: `sudo yum remove fontforge` (for RHEL 6/7) `sudo dnf remove fontforge` (for RHEL 8/9/10 and Fedora) Removing this package may impact functionality that relies on FontForge.

CVE-2025-15275

A flaw was found in FontForge. A remote attacker could exploit a heap-based buffer overflow vulnerability during SFD file parsing. This issue arises from insufficient validation of user-supplied data length before copying it to a buffer. Successful exploitation requires user interaction, such as opening a malicious SFD file, and could lead to arbitrary code execution in the context of the current user.

8.8 (High)


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

CWE-122 - Heap-based Buffer Overflow

Workaround Users should exercise caution and avoid opening untrusted SFD (Spline Font Database) files with FontForge. If FontForge is not essential for system operation, consider removing the `fontforge` package to eliminate the attack vector. This can be achieved using the system's package manager, for example, `sudo dnf remove fontforge` on Red Hat Enterprise Linux and Fedora systems. Removing this package may impact functionality that relies on font editing capabilities.

CVE-2025-15279

A flaw was found in FontForge. This heap-based buffer overflow vulnerability occurs during the parsing of pixels within BMP (Bitmap) files, due to insufficient validation of user-supplied data length. A remote attacker could exploit this by tricking a user into opening a malicious BMP file or visiting a malicious page. Successful exploitation could lead to arbitrary code execution in the context of the current user.

7.8 (High)


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

CWE-122 - Heap-based Buffer Overflow

Workaround Users are advised to avoid opening untrusted or suspicious BMP files with FontForge to prevent exploitation. If FontForge is not a required application, consider removing the `fontforge` package to eliminate the attack surface. Removing this package may impact functionality that relies on FontForge.

References

URL

Category

	https://access.redhat.com/errata/RHSA-2026:7677	self
	https://access.redhat.com/security/updates/classi…	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2426421	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2426423	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2426429	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2426434	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2025-15269	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2426423	external
	https://www.cve.org/CVERecord?id=CVE-2025-15269	external
	https://nvd.nist.gov/vuln/detail/CVE-2025-15269	external
	https://www.zerodayinitiative.com/advisories/ZDI-…	external
	https://access.redhat.com/security/cve/CVE-2025-15270	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2426434	external
	https://www.cve.org/CVERecord?id=CVE-2025-15270	external
	https://nvd.nist.gov/vuln/detail/CVE-2025-15270	external
	https://www.zerodayinitiative.com/advisories/ZDI-…	external
	https://access.redhat.com/security/cve/CVE-2025-15275	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2426429	external
	https://www.cve.org/CVERecord?id=CVE-2025-15275	external
	https://nvd.nist.gov/vuln/detail/CVE-2025-15275	external
	https://www.zerodayinitiative.com/advisories/ZDI-…	external
	https://access.redhat.com/security/cve/CVE-2025-15279	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2426421	external
	https://www.cve.org/CVERecord?id=CVE-2025-15279	external
	https://nvd.nist.gov/vuln/detail/CVE-2025-15279	external
	https://www.zerodayinitiative.com/advisories/ZDI-…	external

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            "CRB-8.10.0.Z.MAIN.EUS:fontforge-debugsource-0:20200314-7.el8_10.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:7677"
        },
        {
          "category": "workaround",
          "details": "Users are advised to avoid opening untrusted or suspicious BMP files with FontForge to prevent exploitation. If FontForge is not a required application, consider removing the `fontforge` package to eliminate the attack surface. Removing this package may impact functionality that relies on FontForge.",
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        }
      ],
      "threats": [
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          "details": "Important"
        }
      ],
      "title": "fontforge: FontForge: Remote Code Execution via heap-based buffer overflow in BMP file parsing"
    }
  ]
}

CVE-2025-15270 (GCVE-0-2025-15270)

Vulnerability from cvelistv5 – Published: 2025-12-31 06:58 – Updated: 2025-12-31 16:58

Title

FontForge SFD File Parsing Improper Validation of Array Index Remote Code Execution Vulnerability

Summary

FontForge SFD File Parsing Improper Validation of Array Index Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of SFD files. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated array. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-28563.

Severity ?

8.8 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-129 - Improper Validation of Array Index

Assigner

zdi

References

URL

Tags

https://www.zerodayinitiative.com/advisories/ZDI-…

x_research-advisory

Impacted products

	Vendor	Product	Version
	FontForge	FontForge	Affected: aca4f524c6cb14cdc7bc4cd493492a33f5154797

Date Public ?

2025-12-29 22:57

Show details on NVD website

JSON

To clipboard

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CVE-2025-15275 (GCVE-0-2025-15275)

Vulnerability from cvelistv5 – Published: 2025-12-31 06:59 – Updated: 2025-12-31 16:58

Title

FontForge SFD File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

Summary

FontForge SFD File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of SFD files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-28543.

Severity ?

8.8 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

zdi

References

URL

Tags

https://www.zerodayinitiative.com/advisories/ZDI-…

x_research-advisory

Impacted products

	Vendor	Product	Version
	FontForge	FontForge	Affected: aca4f524c6cb14cdc7bc4cd493492a33f5154797

Date Public ?

2025-12-29 22:55

Show details on NVD website

JSON

To clipboard

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CVE-2025-15269 (GCVE-0-2025-15269)

Vulnerability from cvelistv5 – Published: 2025-12-31 06:58 – Updated: 2025-12-31 16:23

Title

FontForge SFD File Parsing Use-After-Free Remote Code Execution Vulnerability

Summary

FontForge SFD File Parsing Use-After-Free Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of SFD files. The issue results from the lack of validating the existence of an object prior to performing operations on the object. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-28564.

Severity ?

8.8 (High)


                        
                          CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-416 - Use After Free

Assigner

zdi

References

URL

Tags

https://www.zerodayinitiative.com/advisories/ZDI-…

x_research-advisory

Impacted products

	Vendor	Product	Version
	FontForge	FontForge	Affected: aca4f524c6cb14cdc7bc4cd493492a33f5154797

Date Public ?

2025-12-29 22:57

Show details on NVD website

JSON

To clipboard

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CVE-2025-15279 (GCVE-0-2025-15279)

Vulnerability from cvelistv5 – Published: 2025-12-31 06:59 – Updated: 2025-12-31 16:19

Title

FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability

Summary

FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the parsing of pixels within BMP files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-27517.

Severity ?

7.8 (High)


                        
                          CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE

CWE-122 - Heap-based Buffer Overflow

Assigner

zdi

References

URL

Tags

https://www.zerodayinitiative.com/advisories/ZDI-…

x_research-advisory

Impacted products

	Vendor	Product	Version
	FontForge	FontForge	Affected: 387146a241b36bcdf6ce229c5a3fe367ed3854a1

Date Public ?

2025-12-29 22:54

Show details on NVD website

JSON

To clipboard

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                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-12-31T16:19:31.313184Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-12-31T16:19:37.251Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unknown",
          "product": "FontForge",
          "vendor": "FontForge",
          "versions": [
            {
              "status": "affected",
              "version": "387146a241b36bcdf6ce229c5a3fe367ed3854a1"
            }
          ]
        }
      ],
      "dateAssigned": "2025-12-29T20:02:24.097Z",
      "datePublic": "2025-12-29T22:54:02.069Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of FontForge. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.\n\nThe specific flaw exists within the parsing of pixels within BMP files. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current user. Was ZDI-CAN-27517."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.0"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-122",
              "description": "CWE-122: Heap-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-31T06:59:37.307Z",
        "orgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
        "shortName": "zdi"
      },
      "references": [
        {
          "name": "ZDI-25-1184",
          "tags": [
            "x_research-advisory"
          ],
          "url": "https://www.zerodayinitiative.com/advisories/ZDI-25-1184/"
        }
      ],
      "source": {
        "lang": "en",
        "value": "volticks (@movx64 on twitter)"
      },
      "title": "FontForge GUtils BMP File Parsing Heap-based Buffer Overflow Remote Code Execution Vulnerability"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e",
    "assignerShortName": "zdi",
    "cveId": "CVE-2025-15279",
    "datePublished": "2025-12-31T06:59:37.307Z",
    "dateReserved": "2025-12-29T20:02:24.068Z",
    "dateUpdated": "2025-12-31T16:19:37.251Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:7677

CVE-2025-15270 (GCVE-0-2025-15270)

CVE-2025-15275 (GCVE-0-2025-15275)

CVE-2025-15269 (GCVE-0-2025-15269)

CVE-2025-15279 (GCVE-0-2025-15279)

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