CVE-2024-57256

An integer overflow in ext4fs_read_symlink in Das U-Boot before 2025.01-rc1 occurs for zalloc (adding one to an le32 variable) via a crafted ext4 filesystem with an inode size of 0xffffffff, resulting in a malloc of zero and resultant memory overwrite.

Published: 2025-02-18 Last update: 2026-05-12 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2024-57256 is rated Low Risk (38.5/100): CVSS High severity, with low exploitation likelihood (EPSS 0.36%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2024-57256

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 0.36% +0.30%
2 2026-03-29 0.15% 0.07% -0.09%
3 2026-03-28 — 0.15% —

Full EPSS history (5 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2024-57256

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.1 3.1 HIGH
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:C)
Breaking this can reach past the original component and bite other resources—bigger blast radius.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.5 6.0 [email protected]
6.8 3.1 MEDIUM
CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:P)
Hands-on access—USB, keyboard, opening the case—not something you do purely over the wire.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 0.9 5.9 [email protected]

Weakness enumeration for CVE-2024-57256

GitHub Security Advisory for CVE-2024-57256

GHSA-vmjq-93g5-fvqc · Severity: high — An integer overflow in ext4fs_read_symlink in Das U-Boot before 2025.01-rc1 occurs for zalloc ...

OS Trackers for CVE-2024-57256

vendor priority summary link
alpine high CVE-2024-57256: 1 source package rows (u-boot); 32 state rows across 5 repos (3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 0, open 32. https://security.alpinelinux.org/vuln/CVE-2024-57256
debian not yet assigned CVE-2024-57256 not yet assigned priority: Debian including 1 source packages (u-boot), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2024-57256
suse medium CVE-2024-57256 severity moderate: SUSE including 97 source package names (u-boot-avnetultra96rev1-2021.10-150600.11.3.1, u-boot-avnetultra96rev1-doc-2021.10-150600.11.3.1, …), 187 product×package rows across 11 product lines (SUSE Linux Enterprise Micro 5.2, SUSE Linux Enterprise Micro 5.3, … (11 product lines)): Fixed 187. https://www.suse.com/security/cve/CVE-2024-57256/
ubuntu medium CVE-2024-57256 medium priority: Ubuntu including 2 source packages (u-boot, u-boot-nezha), 16 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): needs-triage 6, ignored 4, released 3, DNE 2, not-affected 1. https://ubuntu.com/security/CVE-2024-57256

Affected software / configurations for CVE-2024-57256

Vendor Product Version Raw CPE
denx u-boot <= 2024.10 cpe:2.3:a:denx:u-boot:*:*:*:*:*:*:*:*

References for CVE-2024-57256

cvelogic Threat Intelligence