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NVD / CVE Program· CNA mozilla

CVE-2024-0755: Memory safety bugs present in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6.

Noroxi assessment

Priority: Monitor (action score 35/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.75% (FIRST EPSS); higher than 55.1% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: firefox (AlmaLinux:8) 115.7.0-1.el8_9.alma.1; thunderbird (AlmaLinux:8) 115.7.0-1.el8_9.alma.1; firefox (AlmaLinux:9) 115.7.0-1.el9_3.alma.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to firefox (AlmaLinux:8) 115.7.0-1.el8_9.alma.1; thunderbird (AlmaLinux:8) 115.7.0-1.el8_9.alma.1; firefox (AlmaLinux:9) 115.7.0-1.el9_3.alma or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

Memory safety bugs present in Firefox 121, Firefox ESR 115.6, and Thunderbird 115.6. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.

HighCVSS 8.8 · v3.1—No exploit Fix available
Published
Jan 23, 2024
Updated
Jun 17, 2026
EPSS
0.7% · 55th percentile

Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
35 / 40 · 8.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2024-0755

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
mozillafirefox
mozillafirefox esr
mozillathunderbird
debiandebian linux

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • debian debian linux10.0
  • mozilla firefoxbefore 122.0
  • mozilla firefox esrbefore 115.7
  • mozilla thunderbirdbefore 115.7

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

    • unspecified and later · before 122affected

  • Mozilla Firefox ESR

    • unspecified and later · before 115.7affected

  • Mozilla Thunderbird

    • unspecified and later · before 115.7affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
AlmaLinux:8firefoxbefore 115.7.0-1.el8_9.alma.1115.7.0-1.el8_9.alma.1
AlmaLinux:8thunderbirdbefore 115.7.0-1.el8_9.alma.1115.7.0-1.el8_9.alma.1
AlmaLinux:9firefoxbefore 115.7.0-1.el9_3.alma115.7.0-1.el9_3.alma
AlmaLinux:9firefox-x11before 115.7.0-1.el9_3.alma115.7.0-1.el9_3.alma
AlmaLinux:9thunderbirdbefore 115.7.0-1.el9_3.alma115.7.0-1.el9_3.alma
Alpine:v3.18firefox-esrbefore 115.7.0-r0115.7.0-r0
Debian:10firefox-esrbefore 115.7.0esr-1~deb10u1115.7.0esr-1~deb10u1
Debian:10thunderbirdbefore 1:115.7.0-1~deb10u11:115.7.0-1~deb10u1
Debian:11firefox-esrbefore 115.7.0esr-1~deb11u1115.7.0esr-1~deb11u1
Debian:11thunderbirdbefore 1:115.7.0-1~deb11u11:115.7.0-1~deb11u1
Debian:12firefox-esrbefore 115.7.0esr-1~deb12u1115.7.0esr-1~deb12u1
Debian:12thunderbirdbefore 1:115.7.0-1~deb12u11:115.7.0-1~deb12u1
Debian:13firefox-esrbefore 115.7.0esr-1115.7.0esr-1
Debian:13thunderbirdbefore 1:115.7.0-11:115.7.0-1
openSUSE:Leap 15.5MozillaFirefoxbefore 115.7.0-150200.152.123.1115.7.0-150200.152.123.1
openSUSE:Leap 15.5MozillaThunderbirdbefore 115.7.0-150200.8.145.1115.7.0-150200.8.145.1
openSUSE:TumbleweedMozillaFirefoxbefore 122.0-1.1122.0-1.1
openSUSE:TumbleweedMozillaThunderbirdbefore 115.7.0-1.1115.7.0-1.1
Red Hat:enterprise_linux:7::clientfirefoxbefore 0:115.7.0-1.el7_90:115.7.0-1.el7_9
Red Hat:enterprise_linux:7::clientfirefox-debuginfobefore 0:115.7.0-1.el7_90:115.7.0-1.el7_9
Red Hat:enterprise_linux:7::clientthunderbirdbefore 0:115.7.0-1.el7_90:115.7.0-1.el7_9
Red Hat:enterprise_linux:7::clientthunderbird-debuginfobefore 0:115.7.0-1.el7_90:115.7.0-1.el7_9
Red Hat:enterprise_linux:8::appstreamfirefoxbefore 0:115.7.0-1.el8_90:115.7.0-1.el8_9
Red Hat:enterprise_linux:8::appstreamfirefox-debuginfobefore 0:115.7.0-1.el8_90:115.7.0-1.el8_9

+54

Same product

mozilla: all records

Other 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 befKEV
    94Now
  • CVE-2019-11708Insufficient vetting of parameters passed with the Prompt:Open IPC message between child and parent processes can result in the non-sandboxeKEV
    87Now
  • 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 bypassKEV
    86Now

Published before and after this one in the same product

  • ← EarlierCVE-2024-0753Jan 23, 2024 · In specific HSTS configurations an attacker could have bypassed HSTS on a subdomain.
    26Monitor
  • ← EarlierCVE-2024-0754Jan 23, 2024 · Some WASM source files could have caused a crash when loaded in devtools.
    26Monitor
  • Later →CVE-2024-1546Feb 20, 2024 · When storing and re-accessing data on a networking channel, the length of buffers may have been confused, resulting in an out-of-bounds memo
    30Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
almalinux:firefox115.7.0-1.el9_3.alma · AlmaLinux:9Package registry (OSV)
almalinux:firefox-x11115.7.0-1.el9_3.alma · AlmaLinux:9Package registry (OSV)
almalinux:thunderbird115.7.0-1.el9_3.alma · AlmaLinux:9Package registry (OSV)
alpine:firefox-esr115.7.0-r0 · Alpine:v3.18Package registry (OSV)
debian:firefox-esr115.7.0esr-1~deb12u1 · Debian:12Package registry (OSV)
debian:thunderbird1:115.7.0-1~deb12u1 · Debian:12Package registry (OSV)
opensuse:MozillaFirefox115.7.0-150200.152.123.1 · openSUSE:Leap 15.5Package registry (OSV)
opensuse:MozillaThunderbird115.7.0-150200.8.145.1 · openSUSE:Leap 15.5Package registry (OSV)
red hat:firefox0:115.7.0-1.el8_4 · Red Hat:rhel_aus:8.4::appstreamPackage registry (OSV)
red hat:firefox-debuginfo0:115.7.0-1.el8_4 · Red Hat:rhel_aus:8.4::appstreamPackage registry (OSV)
red hat:firefox-debugsource0:115.7.0-1.el8_4 · Red Hat:rhel_aus:8.4::appstreamPackage registry (OSV)
red hat:firefox-x110:115.7.0-1.el9_3 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:thunderbird0:115.7.0-1.el8_4 · Red Hat:rhel_aus:8.4::appstreamPackage registry (OSV)
red hat:thunderbird-debuginfo0:115.7.0-1.el8_4 · Red Hat:rhel_aus:8.4::appstreamPackage registry (OSV)
red hat:thunderbird-debugsource0:115.7.0-1.el8_4 · Red Hat:rhel_aus:8.4::appstreamPackage registry (OSV)
rocky linux:firefox0:115.7.0-1.el8_9 · Rocky Linux:8Package registry (OSV)
rocky linux:thunderbird0:115.7.0-1.el8_9 · Rocky Linux:8Package registry (OSV)
suse:MozillaFirefox115.7.0-112.197.1 · SUSE:Linux Enterprise Software Development Kit 12 SP5Package registry (OSV)
suse:MozillaFirefox115.7.0-150200.152.123.1 · SUSE:Linux Enterprise Module for Desktop Applications 15 SP5Package registry (OSV)
suse:MozillaThunderbird115.7.0-150200.8.145.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP5Package 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.

No history yet (it accumulates with the daily EPSS job).

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 researchers

Finders, 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-2024-6602168 days apartMemory corruption in NSS
    39Monitor
  • CVE-2024-11697308 days apartWhen handling keypress events, an attacker may have been able to trick a user into bypassing the "Open Executable File?" confirmation dialog
    35Monitor
  • CVE-2024-11699308 days apartMemory safety bugs present in Firefox 132, Firefox ESR 128.4, and Thunderbird 128.4.
    35Monitor
  • CVE-2025-1011378 days apartA bug in WebAssembly code generation could result in a crash
    35Monitor
  • CVE-2022-22756397 days apartIf a user was convinced to drag and drop an image to their desktop or other folder, the resulting object could have been changed into an exe
    35Monitor
  • CVE-2022-46874397 days apartA file with a long filename could have had its filename truncated to remove the valid extension, leaving a malicious extension in its place.
    35Monitor

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-94 · Improper Control of Generation of Code ('Code Injection')

CVSS vector

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

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records