🛡️ AZL-6343 — busybox (CVE-2021-42374)

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is high, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality low, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: High — the attacker first has to win a race, learn a secret or otherwise prepare the target.
• Privileges required: Low — an ordinary user account is enough.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
• Integrity impact: None.
• Availability impact: High — total loss, or loss the attacker controls.

Affected software

AZL-6343 is recorded against 1 package.

• busybox (fixed in 1.35.0-1)

Timeline and source

Published on 15 November 2021 and last revised on 21 April 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Web)

Other advisories for this package

busybox has other advisories on record. If you are patching this one, these are worth checking on the same host:

• ROOT-OS-ALPINE-317-CVE-2022-48174 (9.5 Critical, published 10 Aug 2026)
• ROOT-OS-ALPINE-315-CVE-2022-48174 (9.5 Critical, published 10 Aug 2026)
• OESA-2026-3312 (5.0 Medium, published 7 Aug 2026)
• RHSA-2026:42074 (published 23 Jul 2026)
• ECHO-d46b-865d-7398 (published 20 Jul 2026)
• ECHO-d18b-2042-fd80 (published 20 Jul 2026)
• ECHO-9efd-d326-a8a6 (published 20 Jul 2026)
• ECHO-7f94-d993-4cdc (published 20 Jul 2026)

Details

Affected Packages

References