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CVE-2022-26486

Mozilla Firefox Use-After-Free

9.6 CRITICALActively exploited (CISA KEV)Public exploitEPSS 2.35%
  1. Published22 Dec 2022
  2. Added to CISA KEV7 Mar 2022
  3. Remediation due21 Mar 2022
Actively exploited (CISA KEV)

Mozilla Firefox contains a use-after-free vulnerability in WebGPU IPC Framework which can be exploited to perform arbitrary code execution.

Added to KEV: 7 Mar 2022Federal remediation due: 21 Mar 2022

Description

An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape. We have had reports of attacks in the wild abusing this flaw. This vulnerability affects Firefox < 97.0.2, Firefox ESR < 91.6.1, Firefox for Android < 97.3.0, Thunderbird < 91.6.2, and Focus < 97.3.0.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Affected products

Mozilla Firefox< 97.0.2 · < 91.6.1
Mozilla Firefox Focus< 97.3.0
Mozilla Firefox Mobile< 97.3.0
Mozilla Thunderbird< 91.6.2

Remediation

Fixed in
Mozilla Firefox≥ 97.0.2
Mozilla Firefox Focus≥ 97.3.0
Mozilla Firefox Mobile≥ 97.3.0
Mozilla Thunderbird≥ 91.6.2

References

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Frequently asked

Is CVE-2022-26486 being actively exploited?

Yes. CVE-2022-26486 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 7 Mar 2022.

How severe is CVE-2022-26486?

CVE-2022-26486 has a CVSS 3.1 base score of 9.6, rated critical. EPSS estimates a 2.35% probability of exploitation.

Which products are affected by CVE-2022-26486?

Affected products include Mozilla Firefox, Mozilla Firefox Focus, Mozilla Firefox Mobile, Mozilla Thunderbird.

How do I fix CVE-2022-26486?

Upgrade affected software to a fixed version, for example Mozilla Firefox 97.0.2, Mozilla Firefox Focus 97.3.0, Mozilla Firefox Mobile 97.3.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2022-26486 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.