Denial-of-service due to out-of-memory in the Graphics: WebRender component
Denial-of-service due to out-of-memory in the Graphics: WebRender component. This vulnerability was fixed in Firefox 142, Firefox ESR 140.2, Thunderbird 142, and Thunderbird 140.2.
- BDU:2025-10388
- ALSA-2025:14416
- ALSA-2025:14417
- ALSA-2025:14442
- ALSA-2025:14640
- ALSA-2025:14743
- ALSA-2025:14844
- openSUSE-SU-2025:15467-1
- openSUSE-SU-2025:15472-1
- openSUSE-SU-2025:15516-1
- RHSA-2025:14416
- RHSA-2025:14417
- RHSA-2025:14442
- RHSA-2025:14640
- RHSA-2025:14743
- RHSA-2025:14844
- RHSA-2025:15418
- RHSA-2025:15419
- RHSA-2025:15420
- RHSA-2025:15421
- Published
- Aug 19, 2025
- Updated
- Sep 30, 2026
- EPSS
- 0.4% · 31th percentile
- CWE
- CWE-400
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Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| mozilla | firefox | cpe:2.3:a:mozilla:firefox |
| mozilla | thunderbird | cpe:2.3:a:mozilla:thunderbird |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- mozilla firefoxbefore 140.2.0
- mozilla firefoxbefore 142.0
- mozilla thunderbirdbefore 140.2.0
- mozilla thunderbirdbefore 142.0
Versions reported by the vendor
Affected version ranges reported by the assigning authority (mozilla). Independent of NVD's CPE analysis and usually ahead of it.
Mozilla Firefox
- 140.2 and later · up to and including 140.*not affected · rpm
- 142 and laternot affected · rpm
Mozilla Thunderbird
- 140.2 and later · up to and including 140.*not affected · rpm
- 142 and laternot affected · rpm
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| AlmaLinux:10 | firefox | before 128.14.0-2.el10_0 | 128.14.0-2.el10_0 |
| AlmaLinux:10 | thunderbird | before 128.14.0-3.el10_0.alma.1 | 128.14.0-3.el10_0.alma.1 |
| AlmaLinux:8 | firefox | before 128.14.0-2.el8_10.alma.1 | 128.14.0-2.el8_10.alma.1 |
| AlmaLinux:8 | thunderbird | before 128.14.0-3.el8_10.alma.1 | 128.14.0-3.el8_10.alma.1 |
| AlmaLinux:9 | firefox | before 128.14.0-2.el9_6.alma.1 | 128.14.0-2.el9_6.alma.1 |
| AlmaLinux:9 | firefox-x11 | before 128.14.0-2.el9_6.alma.1 | 128.14.0-2.el9_6.alma.1 |
| AlmaLinux:9 | thunderbird | before 128.14.0-3.el9_6.alma.1 | 128.14.0-3.el9_6.alma.1 |
| openSUSE:Tumbleweed | firefox-esr | before 140.2.0-1.1 | 140.2.0-1.1 |
| openSUSE:Tumbleweed | MozillaFirefox | before 142.0.1-1.1 | 142.0.1-1.1 |
| openSUSE:Tumbleweed | MozillaThunderbird | before 140.2.0-1.1 | 140.2.0-1.1 |
| Red Hat:enterprise_linux:10.0 | firefox | before 0:128.14.0-2.el10_0 | 0:128.14.0-2.el10_0 |
| Red Hat:enterprise_linux:10.0 | firefox-debuginfo | before 0:128.14.0-2.el10_0 | 0:128.14.0-2.el10_0 |
| Red Hat:enterprise_linux:10.0 | firefox-debugsource | before 0:128.14.0-2.el10_0 | 0:128.14.0-2.el10_0 |
| Red Hat:enterprise_linux:10.0 | thunderbird | before 0:128.14.0-3.el10_0 | 0:128.14.0-3.el10_0 |
| Red Hat:enterprise_linux:10.0 | thunderbird-debuginfo | before 0:128.14.0-3.el10_0 | 0:128.14.0-3.el10_0 |
| Red Hat:enterprise_linux:10.0 | thunderbird-debugsource | before 0:128.14.0-3.el10_0 | 0:128.14.0-3.el10_0 |
| Red Hat:enterprise_linux:8::appstream | firefox | before 0:128.14.0-2.el8_10 | 0:128.14.0-2.el8_10 |
| Red Hat:enterprise_linux:8::appstream | firefox-debuginfo | before 0:128.14.0-2.el8_10 | 0:128.14.0-2.el8_10 |
| Red Hat:enterprise_linux:8::appstream | firefox-debugsource | before 0:128.14.0-2.el8_10 | 0:128.14.0-2.el8_10 |
| Red Hat:enterprise_linux:8::appstream | thunderbird | before 0:128.14.0-3.el8_10 | 0:128.14.0-3.el8_10 |
| Red Hat:enterprise_linux:8::appstream | thunderbird-debuginfo | before 0:128.14.0-3.el8_10 | 0:128.14.0-3.el8_10 |
| Red Hat:enterprise_linux:8::appstream | thunderbird-debugsource | before 0:128.14.0-3.el8_10 | 0:128.14.0-3.el8_10 |
| Red Hat:enterprise_linux:9::appstream | firefox | before 0:128.14.0-2.el9_6 | 0:128.14.0-2.el9_6 |
| Red Hat:enterprise_linux:9::appstream | firefox-debuginfo | before 0:128.14.0-2.el9_6 | 0:128.14.0-2.el9_6 |
+61
Same product
mozilla: all recordsOther highest-scoring records for the same primary product.
- CVE-2010-3765Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before 3.1.6 and 3.0.x before 3.0.10, and SeaMonkey 2.x befKEV94Now
- CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV87Now
- CVE-2015-4495The PDF reader in Mozilla Firefox before 39.0.3, Firefox ESR 38.x before 38.1.1, and Firefox OS before 2.2 allows remote attackers to bypassKEV86Now
- CVE-2013-1690Mozilla Firefox before 22.0, Firefox ESR 17.x before 17.0.7, Thunderbird before 17.0.7, and Thunderbird ESR 17.x before 17.0.7 do not properKEV86Now
- CVE-2019-17026Incorrect alias information in IonMonkey JIT compiler for setting array elements could lead to a type confusion.KEV79This week
- CVE-2024-9680An attacker was able to achieve code execution in the content process by exploiting a use-after-free in Animation timelines.KEV76This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| almalinux:firefox | 128.14.0-2.el9_6.alma.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:firefox-x11 | 128.14.0-2.el9_6.alma.1 · AlmaLinux:9 | Package registry (OSV) |
| almalinux:thunderbird | 128.14.0-3.el9_6.alma.1 · AlmaLinux:9 | Package registry (OSV) |
| opensuse:firefox-esr | 140.2.0-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| opensuse:MozillaFirefox | 140.2.0-150200.152.198.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:MozillaThunderbird | 140.2.0-150200.8.236.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| red hat:firefox | 0:128.14.0-2.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:firefox-debuginfo | 0:128.14.0-2.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:firefox-debugsource | 0:128.14.0-2.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:firefox-x11 | 0:128.14.0-2.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:thunderbird | 0:128.14.0-3.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:thunderbird-debuginfo | 0:128.14.0-3.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| red hat:thunderbird-debugsource | 0:128.14.0-3.el9_6 · Red Hat:enterprise_linux:9::appstream | Package registry (OSV) |
| rocky linux:firefox | 0:128.14.0-2.el9_6 · Rocky Linux:9 | Package registry (OSV) |
| rocky linux:thunderbird | 0:128.14.0-3.el8_10 · Rocky Linux:8 | Package registry (OSV) |
| suse:MozillaFirefox | 140.2.0-150200.152.198.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP6 | Package registry (OSV) |
| suse:MozillaThunderbird | 140.2.0-150200.8.236.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP6 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2025-550290 days apartMalicious scripts could spam popups for denial of service attacks30Monitor
- CVE-2026-0889147 days apartDenial-of-service in the DOM: Service Workers component30Monitor
- CVE-2026-4704217 days apartDenial-of-service in the WebRTC: Signaling component30Monitor
- CVE-2026-4726217 days apartDenial-of-service in the XML component30Monitor
- CVE-2026-4727217 days apartDenial-of-service in the Libraries component in NSS30Monitor
- CVE-2026-6780245 days apartDenial-of-service in the Audio/Video: Playback component30Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-400 · Uncontrolled Resource ConsumptionCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-secondary
Root cause
Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.
The bug in code
The whole CWE-400 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
function expand(node) { return node.children.map(expand);}Fixed
const MAX_DEPTH = 32;function expand(node, depth = 0) { if (depth > MAX_DEPTH) throw new Error("too deep"); return node.children.map((c) => expand(c, depth + 1));}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- bugzilla.mozilla.org/show_bug.cgi?id=1975837
- www.mozilla.org/security/advisories/mfsa2025-64/
- www.mozilla.org/security/advisories/mfsa2025-67/
- www.mozilla.org/security/advisories/mfsa2025-70/
- www.mozilla.org/security/advisories/mfsa2025-72/
Vendor advisories and official records. Exploit/PoC links are deliberately left out.