OESA-2026-3456

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-3456
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-3456.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-3456
Upstream
  • CVE-2026-66484
  • CVE-2026-66485
Published
2026-08-20T10:00:01Z
Modified
2026-08-20T10:15:12Z
Severity
  • 4.6 (Medium) CVSS_V4 - CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N CVSS Calculator
Summary
cpio security update
Details

GNU cpio copies files into or out of a cpio or tar archive. The archive can be another file on the disk, a magnetic tape, or a pipe.

Security Fix(es):

GNU cpio contains a Path Traversal vulnerability in its tar archive extraction functionality. When extracting a tar archive in copy-in mode with the --no-absolute-filenames option, the extracted file name is normalized but the tar hard-link target is passed to the link_to_name function without equivalent sanitization before calling link function. A tar archive provided by an attacker, containing a hard-link entry whose linkname is set to an absolute path outside the extraction directory, can cause cpio to create a hard link to an existing file outside the intended extraction directory, breaking the expected guarantee of --no-absolute-filenames and allowing archive-controlled linkage to external files.

This issue has been fixed in commit e2b9cbdd3354d2b1569b7390d1bc15c1930559ad(CVE-2026-66484)

GNU cpio is vulnerable to an uncontrolled memory allocation in the make_path function at src/makepath.c. The function uses alloca to allocate stack memory based on the length of argpath, which is derived from an archive-controlled pathname during extraction. A malicious cpio archive containing a sufficiently long nested pathname causes an unbounded stack allocation, resulting in a stack overflow and crash of the cpio process. An attacker who can supply a crafted cpio archive to a victim who extracts it can cause a denial of service.

This issue has been fixed in commit 3cd514031371d8aeeaf2048aa10103e02831aaa9(CVE-2026-66485)

Database specific 
{
    "severity": "Medium"
}
References

Affected packages

openEuler:20.03-LTS-SP4
cpio

Package

Name
cpio
Purl
pkg:rpm/openEuler/cpio&distro=openEuler-20.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.13-9.oe2003sp4

Ecosystem specific 

{
    "aarch64": [
        "cpio-2.13-9.oe2003sp4.aarch64.rpm",
        "cpio-debuginfo-2.13-9.oe2003sp4.aarch64.rpm",
        "cpio-debugsource-2.13-9.oe2003sp4.aarch64.rpm"
    ],
    "noarch": [
        "cpio-help-2.13-9.oe2003sp4.noarch.rpm"
    ],
    "src": [
        "cpio-2.13-9.oe2003sp4.src.rpm"
    ],
    "x86_64": [
        "cpio-2.13-9.oe2003sp4.x86_64.rpm",
        "cpio-debuginfo-2.13-9.oe2003sp4.x86_64.rpm",
        "cpio-debugsource-2.13-9.oe2003sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3456.json"
openEuler:22.03-LTS-SP4
cpio

Package

Name
cpio
Purl
pkg:rpm/openEuler/cpio&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.13-12.oe2203sp4

Ecosystem specific 

{
    "aarch64": [
        "cpio-2.13-12.oe2203sp4.aarch64.rpm",
        "cpio-debuginfo-2.13-12.oe2203sp4.aarch64.rpm",
        "cpio-debugsource-2.13-12.oe2203sp4.aarch64.rpm"
    ],
    "noarch": [
        "cpio-help-2.13-12.oe2203sp4.noarch.rpm"
    ],
    "src": [
        "cpio-2.13-12.oe2203sp4.src.rpm"
    ],
    "x86_64": [
        "cpio-2.13-12.oe2203sp4.x86_64.rpm",
        "cpio-debuginfo-2.13-12.oe2203sp4.x86_64.rpm",
        "cpio-debugsource-2.13-12.oe2203sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3456.json"
openEuler:24.03-LTS-SP1
cpio

Package

Name
cpio
Purl
pkg:rpm/openEuler/cpio&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.14-5.oe2403sp1

Ecosystem specific 

{
    "aarch64": [
        "cpio-2.14-5.oe2403sp1.aarch64.rpm",
        "cpio-debuginfo-2.14-5.oe2403sp1.aarch64.rpm",
        "cpio-debugsource-2.14-5.oe2403sp1.aarch64.rpm"
    ],
    "noarch": [
        "cpio-help-2.14-5.oe2403sp1.noarch.rpm"
    ],
    "src": [
        "cpio-2.14-5.oe2403sp1.src.rpm"
    ],
    "x86_64": [
        "cpio-2.14-5.oe2403sp1.x86_64.rpm",
        "cpio-debuginfo-2.14-5.oe2403sp1.x86_64.rpm",
        "cpio-debugsource-2.14-5.oe2403sp1.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3456.json"
openEuler:24.03-LTS-SP3
cpio

Package

Name
cpio
Purl
pkg:rpm/openEuler/cpio&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.14-5.oe2403sp3

Ecosystem specific 

{
    "aarch64": [
        "cpio-2.14-5.oe2403sp3.aarch64.rpm",
        "cpio-debuginfo-2.14-5.oe2403sp3.aarch64.rpm",
        "cpio-debugsource-2.14-5.oe2403sp3.aarch64.rpm"
    ],
    "noarch": [
        "cpio-help-2.14-5.oe2403sp3.noarch.rpm"
    ],
    "src": [
        "cpio-2.14-5.oe2403sp3.src.rpm"
    ],
    "x86_64": [
        "cpio-2.14-5.oe2403sp3.x86_64.rpm",
        "cpio-debuginfo-2.14-5.oe2403sp3.x86_64.rpm",
        "cpio-debugsource-2.14-5.oe2403sp3.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3456.json"
openEuler:24.03-LTS-SP4
cpio

Package

Name
cpio
Purl
pkg:rpm/openEuler/cpio&distro=openEuler-24.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.14-5.oe2403sp4

Ecosystem specific 

{
    "aarch64": [
        "cpio-2.14-5.oe2403sp4.aarch64.rpm",
        "cpio-debuginfo-2.14-5.oe2403sp4.aarch64.rpm",
        "cpio-debugsource-2.14-5.oe2403sp4.aarch64.rpm"
    ],
    "noarch": [
        "cpio-help-2.14-5.oe2403sp4.noarch.rpm"
    ],
    "src": [
        "cpio-2.14-5.oe2403sp4.src.rpm"
    ],
    "x86_64": [
        "cpio-2.14-5.oe2403sp4.x86_64.rpm",
        "cpio-debuginfo-2.14-5.oe2403sp4.x86_64.rpm",
        "cpio-debugsource-2.14-5.oe2403sp4.x86_64.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-3456.json"