CVE-2024-4777: debian debian_linux Out-of-bounds Write
Vulnerability summary
CVE-2024-4777 is a high (CVSS 8.8) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.54% chance of exploitation in the next 30 days, higher than 44% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 32 · Related 10Timeline
- 14-05-2024PublishedVulnerability first disclosed.
- 13-03-2025Last modifiedVulnerability information updated.
Description
Memory safety bugs present in Firefox 125, Firefox ESR 115.10, and Thunderbird 115.10. 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 < 126, Firefox ESR < 115.11, and Thunderbird < 115.11.
CVSS metrics
5 scores · 5 sources · 1 version- CVE.orgCNA7.5HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HDiffers
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:HDiffers
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · ChainguardEcosystem advisory · calculated8.8HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.54%
Chance of exploitation in the next 30 days
Percentile
44%
Versus all other CVEs
30-day change
0.00 pp
From 0.54% on 19-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.
- CWE-416Use After FreeThe product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
Affected systems
Ubuntu8 products
- firefox< 126.0+build2-0ubuntu0.20.04.1
- mozjs102All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
Debian3 products
- firefox-esr< 115.11.0esr-1~deb12u1 | < 115.11.0esr-1
- thunderbird< 1:115.11.0-1~deb12u1 | < 1:115.11.0-1
- debian_linuxEOL10.0
Mozilla3 products
- firefox≥ unspecified, < 126 | < 115.11.0 | < 126.0
- firefox_esr≥ unspecified, < 115.11
- thunderbird≥ unspecified, < 115.11 | < 115.11.0
Chainguard1 product
- firefox-esr< 115.11.0-r0
4 vendors · 15 products
