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CVE Vulnerabilities

CVE-2026-2447

Heap-based Buffer Overflow

Published: Feb 16, 2026 | Modified: Jun 30, 2026
CVSS 3.x
N/A
Source:
NVD
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 IMPORTANT
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Ubuntu
MEDIUM
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Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-2447
CWEhttps://cwe.mitre.org/data/definitions/122.html

Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.

Weakness

A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().

Affected Software

NameVendorStart VersionEnd Version
FirefoxMozilla*115.32.1 (excluding)
FirefoxMozilla*147.0.4 (excluding)
FirefoxMozilla116.0 (including)140.7.1 (excluding)
ThunderbirdMozilla*140.7.2 (excluding)
ThunderbirdMozilla141.0 (including)147.0.2 (excluding)
Red Hat Enterprise Linux 10RedHatfirefox-0:140.8.0-2.el10_1*
Red Hat Enterprise Linux 10RedHatthunderbird-0:140.8.0-2.el10_1*
Red Hat Enterprise Linux 10RedHatlibvpx-0:1.14.1-6.el10_1*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatfirefox-0:140.8.0-2.el10_0*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatthunderbird-0:140.8.0-2.el10_0*
Red Hat Enterprise Linux 10.0 Extended Update SupportRedHatlibvpx-0:1.14.1-3.el10_0.1*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatfirefox-0:140.8.0-2.el7_9*
Red Hat Enterprise Linux 7 Extended Lifecycle SupportRedHatlibvpx-0:1.3.0-8.el7_9.3*
Red Hat Enterprise Linux 8RedHatfirefox-0:140.8.0-2.el8_10*
Red Hat Enterprise Linux 8RedHatthunderbird-0:140.8.0-1.el8_10*
Red Hat Enterprise Linux 8RedHatlibvpx-0:1.7.0-13.el8_10*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatfirefox-0:140.8.0-2.el8_2*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatthunderbird-0:140.8.0-1.el8_2*
Red Hat Enterprise Linux 8.2 Advanced Update SupportRedHatlibvpx-0:1.7.0-8.el8_2.2*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatfirefox-0:140.8.0-2.el8_4*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatthunderbird-0:140.8.0-2.el8_4*
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update SupportRedHatlibvpx-0:1.7.0-10.el8_4.2*
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRedHatfirefox-0:140.8.0-2.el8_4*
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRedHatthunderbird-0:140.8.0-2.el8_4*
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-OnRedHatlibvpx-0:1.7.0-10.el8_4.2*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatfirefox-0:140.8.0-2.el8_6*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatthunderbird-0:140.8.0-1.el8_6*
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update SupportRedHatlibvpx-0:1.7.0-10.el8_6.2*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatfirefox-0:140.8.0-2.el8_6*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatthunderbird-0:140.8.0-1.el8_6*
Red Hat Enterprise Linux 8.6 Telecommunications Update ServiceRedHatlibvpx-0:1.7.0-10.el8_6.2*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatfirefox-0:140.8.0-2.el8_6*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatthunderbird-0:140.8.0-1.el8_6*
Red Hat Enterprise Linux 8.6 Update Services for SAP SolutionsRedHatlibvpx-0:1.7.0-10.el8_6.2*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatfirefox-0:140.8.0-2.el8_8*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatthunderbird-0:140.8.0-1.el8_8*
Red Hat Enterprise Linux 8.8 Telecommunications Update ServiceRedHatlibvpx-0:1.7.0-10.el8_8.2*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatfirefox-0:140.8.0-2.el8_8*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatthunderbird-0:140.8.0-1.el8_8*
Red Hat Enterprise Linux 8.8 Update Services for SAP SolutionsRedHatlibvpx-0:1.7.0-10.el8_8.2*
Red Hat Enterprise Linux 9RedHatfirefox-0:140.8.0-2.el9_7*
Red Hat Enterprise Linux 9RedHatthunderbird-0:140.8.0-1.el9_7*
Red Hat Enterprise Linux 9RedHatlibvpx-0:1.9.0-10.el9_7*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatfirefox-0:140.8.0-2.el9_0*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatthunderbird-0:140.8.0-1.el9_0*
Red Hat Enterprise Linux 9.0 Update Services for SAP SolutionsRedHatlibvpx-0:1.9.0-7.el9_0.3*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatthunderbird-0:140.8.0-1.el9_2*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatfirefox-0:140.8.0-2.el9_2*
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRedHatlibvpx-0:1.9.0-7.el9_2.3*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHatfirefox-0:140.8.0-2.el9_4*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHatthunderbird-0:140.8.0-1.el9_4*
Red Hat Enterprise Linux 9.4 Extended Update SupportRedHatlibvpx-0:1.9.0-7.el9_4.3*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatfirefox-0:140.8.0-2.el9_6*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatthunderbird-0:140.8.0-1.el9_6*
Red Hat Enterprise Linux 9.6 Extended Update SupportRedHatlibvpx-0:1.9.0-9.el9_6.1*
Red Hat AI Inference Server 3.3RedHatrhaiis/vllm-spyre-rhel9:1778244546*
Red Hat AI Inference Server 3.3RedHatrhaiis/vllm-cuda-rhel9:1775680192*
Red Hat AI Inference Server 3.3RedHatrhaiis/vllm-rocm-rhel9:1775680262*
Red Hat AI Inference Server 3.3RedHatrhaiis/model-opt-cuda-rhel9:1775749857*
LibvpxUbuntudevel*
LibvpxUbuntuesm-infra/xenial*
LibvpxUbuntujammy*
LibvpxUbuntunoble*
LibvpxUbuntuquesting*
LibvpxUbunturesolute*
ThunderbirdUbuntujammy*
ThunderbirdUbuntuupstream*

Potential Mitigations

  • 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 checking.
  • D3-SFCV (Stack Frame Canary Validation) from D3FEND [REF-1334] discusses canary-based detection in detail.
  • Run or compile the software using features or extensions that randomly arrange the positions of a program’s executable and libraries in memory. Because this makes the addresses unpredictable, it can prevent an attacker from reliably jumping to exploitable code.
  • Examples include Address Space Layout Randomization (ASLR) [REF-58] [REF-60] and Position-Independent Executables (PIE) [REF-64]. Imported modules may be similarly realigned if their default memory addresses conflict with other modules, in a process known as “rebasing” (for Windows) and “prelinking” (for Linux) [REF-1332] using randomly generated addresses. ASLR for libraries cannot be used in conjunction with prelink since it would require relocating the libraries at run-time, defeating the whole purpose of prelinking.
  • For more information on these techniques see D3-SAOR (Segment Address Offset Randomization) from D3FEND [REF-1335].

References

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