CVE-2024-42040: denx u-boot Classic Buffer Overflow
Vulnerability summary
CVE-2024-42040 is a high (CVSS 8.1) Classic Buffer Overflow vulnerability in denx u-boot. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 47.9% of scored vulnerabilities.
Timeline
- 23-08-2024PublishedVulnerability first disclosed.
- 20-11-2024Last modifiedVulnerability information updated.
Description
Buffer Overflow vulnerability in the net/bootp.c in DENEX U-Boot from its initial commit in 2002 (3861aa5) up to today on any platform allows an attacker on the local network to leak memory from four up to 32 bytes of memory stored behind the packet to the network depending on the later use of DHCP-provided parameters via crafted DHCP responses.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- OSV · DebianEcosystem advisory · calculated8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- NVDNIST8.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS trend
Probability
0.60%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.60% on 22-09-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu2 products
- u-bootAll versions (No fix recorded)
- u-boot-nezhaAll versions (No fix recorded)
Debian1 product
- u-boot< 2023.01+dfsg-2+deb12u3 | < 2025.01-3+deb13u1 | < 2025.01-3.2
Denx1 product
- u-boot≤ 2025.10
3 vendors · 4 products
References
7 links- github.com/u-boot/u-boot/tagsRelease Notes
