CVE-2026-66486
Publication date 10 August 2026
Last updated 1 September 2026
Ubuntu priority
Description
GNU cpio is vulnerable to improper encoding or escaping of output in its archive member listing functionality. When listing archive members via cpio -it, member names are printed directly to output without quoting or escaping. An attacker can craft a cpio archive containing member names with embedded newline characters or ANSI escape sequences, causing forged listing entries or terminal control sequence injection when the listing is displayed. This issue has been fixed in commit 2ff9600c9ef32e88759843cdbde74c8db5ae9b30
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| cpio | 26.04 LTS resolute |
Fixed in 2.15+dfsg-2.1ubuntu0.1
|
| 24.04 LTS noble |
Fixed in 2.15+dfsg-1ubuntu2.1
|
|
| 22.04 LTS jammy |
Fixed in 2.13+dfsg-7ubuntu0.2
|
|
| 20.04 LTS focal |
Fixed in 2.13+dfsg-2ubuntu0.4+esm1
|
|
| 18.04 LTS bionic |
Fixed in 2.12+dfsg-6ubuntu0.18.04.4+esm1
|
|
| 16.04 LTS xenial |
Fixed in 2.11+dfsg-5ubuntu1.1+esm2
|
|
| 14.04 LTS trusty |
Fixed in 2.11+dfsg-1ubuntu1.2+esm3
|
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CVSS version: CVSS v4.0
Base score
4.6 · Medium
Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
References
Related Ubuntu Security Notices (USN)
- USN-8704-1
- GNU cpio vulnerabilities
- 31 August 2026