Is CVE-2024-6603 in the CISA KEV catalog?

No. CVE-2024-6603 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-6603?

CVE-2024-6603 has a CVSS v3 base score of 7.4 (HIGH).

What is the EPSS score for CVE-2024-6603?

CVE-2024-6603 has an EPSS score of 0.53% (41th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-6603?

Upgrade firefox on debian unstable to 128.0-1 or later. Fixes are available for 20 affected products.

CVE & CISA-KEV Catalog

CVE-2024-6603

HIGH

7.4

CVSS v3

NVD

Description

In an out-of-memory scenario an allocation could fail but free would have been called on the pointer afterwards leading to memory corruption. This vulnerability affects Firefox < 128, Firefox ESR < 115.13, Thunderbird < 115.13, and Thunderbird < 128.

CWE-823

How to fix

Remediation Available

firefoxDebian

Fixed in:128.0-1CVE-2024-6603

firefoxRed Hat / RHEL

Fixed in:0:115.13.0-3.el7_9.ppc64RHSA-2024:4508

Fixed in:0:115.13.0-3.el7_9RHSA-2024:4508

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4517

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4586

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4610

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

firefoxRocky

Fixed in:0:115.13.0-3.el7_9RHSA-2024:4508

Fixed in:0:115.13.0-3.el7_9.ppc64RHSA-2024:4508

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4517

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4586

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4610

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4610

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4517

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

firefox-debuginfoRocky

Fixed in:0:115.13.0-3.el7_9RHSA-2024:4508

Fixed in:0:115.13.0-3.el7_9.ppc64RHSA-2024:4508

Fixed in:0:115.13.0-3.el7_9RHSA-2024:4508

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4517

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4586

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4610

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

firefox-debuginfoRed Hat / RHEL

Fixed in:0:115.13.0-3.el7_9RHSA-2024:4508

Fixed in:0:115.13.0-3.el7_9.ppc64RHSA-2024:4508

Fixed in:0:115.13.0-3.el7_9RHSA-2024:4508

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4517

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4586

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4610

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

firefox-debugsourceRocky

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4586

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4610

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4517

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

firefox-debugsourceRed Hat / RHEL

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4586

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4610

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4517

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4634

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4590

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4501

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

firefox-x11Red Hat / RHEL

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

firefox-x11Rocky

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4673

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4500

thunderbirdRocky

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4717

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

thunderbirdRed Hat / RHEL

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4717

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

thunderbird-debuginfoRocky

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4717

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

thunderbird-debuginfoRed Hat / RHEL

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4717

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

thunderbird-debugsourceRocky

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4717

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

thunderbird-debugsourceRed Hat / RHEL

Fixed in:0:115.13.0-3.el8_6RHSA-2024:4894

Fixed in:0:115.13.0-3.el8_2RHSA-2024:4717

Fixed in:0:115.13.0-3.el8_8RHSA-2024:4718

Fixed in:0:115.13.0-3.el8_4RHSA-2024:4671

Fixed in:0:115.13.0-3.el8_10RHSA-2024:4635

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

Fixed in:0:115.13.0-3.el9_2RHSA-2024:4670

Fixed in:0:115.13.0-3.el9_0RHSA-2024:4625

Fixed in:0:115.13.0-3.el9_4RHSA-2024:4624

firefoxUbuntu

Fixed in:128.0+build2-0ubuntu0.20.04.1USN-6890-1

thunderbirdUbuntu

Fixed in:1:115.13.0+build5-0ubuntu0.20.04.1USN-6903-1

Fixed in:1:115.13.0+build5-0ubuntu0.22.04.1USN-6903-1

DeveloperEditionWindows application

Affected:115.13Fixed in:115.13Mozilla

Affected:128.0Fixed in:128.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:115.13Fixed in:115.13Mozilla

Affected:128.0Fixed in:128.0Mozilla

Mozilla Thunderbird (en-US)Windows application

Affected:115.13Fixed in:115.13Mozilla

Affected:116.0 128.0Fixed in:128.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

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

Exploit Intelligence

0.53%probability of exploitation in 30 days

41stpercentile

Moderate risk: more likely to be exploited than 41% of all known CVEs.

References

Vendor Advisory4

Issue Tracking1

bugzilla.mozilla.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-04-04.