CVE-2026-124745
Busybox: tar deferred hardlink target resolved through a deferred symlink escapes the extraction directory
CVE-2026-124745 is a medium vulnerability (CVSS 6.3) in Red Hat Enterprise Linux 6, published October 14, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.17%, the 6th percentile. No source names a fixed version.
- Severity
- 6.3 MediumCVSS 3.1, CVE List
- Exploit chance
- 0.17%EPSS, 6th percentile
- Exploitation
- None knownNot on CISA’s or ENISA’s lists
- Fixed in
- No fix listedNo source names one
Description
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- None
- User interaction
- Required
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- None
Exploit likelihood
Discussion
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
busyboxDebian:12 | All versions, plus listed versions 1:1.35.0-41:1.35.0-4+deb12u11:1.36.0-1~exp11:1.36.1-11:1.36.1-2 Show 23 moreShow less1:1.36.1-31:1.36.1-3.11:1.36.1-41:1.36.1-51:1.36.1-61:1.36.1-6~exp.11:1.36.1-71:1.36.1-81:1.36.1-91:1.37.0-11:1.37.0-101:1.37.0-10.11:1.37.0-21:1.37.0-31:1.37.0-41:1.37.0-51:1.37.0-61:1.37.0-71:1.37.0-81:1.37.0-91:1.38.0-11:1.38.0-21:1.38.0-3 | None known |
busyboxDebian:13 | All versions, plus listed versions 1:1.37.0-101:1.37.0-10.11:1.37.0-61:1.37.0-71:1.37.0-8 Show 4 moreShow less1:1.37.0-91:1.38.0-11:1.38.0-21:1.38.0-3 | None known |
busyboxDebian:14 | All versions, plus listed versions 1:1.37.0-101:1.37.0-10.11:1.37.0-61:1.37.0-71:1.37.0-8 Show 4 moreShow less1:1.37.0-91:1.38.0-11:1.38.0-21:1.38.0-3 | None known |
busyboxRed Hat:hummingbird:1 From an advisory covering 4 CVEs | before 1:1.37.0-9.4.hum1 | 1:1.37.0-9.4.hum1 |
busybox-petitbootRed Hat:hummingbird:1 From an advisory covering 4 CVEs | before 1:1.37.0-9.4.hum1 | 1:1.37.0-9.4.hum1 |
busybox-sharedRed Hat:hummingbird:1 From an advisory covering 4 CVEs | before 1:1.37.0-9.4.hum1 | 1:1.37.0-9.4.hum1 |
busyboxUbuntu:Pro:14.04:LTS | All versions, plus listed versions 1:1.20.0-8.1ubuntu11:1.20.0-9ubuntu11:1.20.0-9ubuntu21:1.21.0-1ubuntu11:1.21.0-1ubuntu1.41:1.21.0-1ubuntu1.4+esm1 | None known |
busyboxUbuntu:Pro:16.04:LTS | All versions, plus listed versions 1:1.22.0-15ubuntu11:1.22.0-15ubuntu1.41:1.22.0-15ubuntu1.4+esm11:1.22.0-15ubuntu1.4+esm2 | None known |
busyboxUbuntu:Pro:18.04:LTS | All versions, plus listed versions 1:1.22.0-19ubuntu21:1.27.2-1ubuntu31:1.27.2-1ubuntu41:1.27.2-2ubuntu21:1.27.2-2ubuntu3 Show 5 moreShow less1:1.27.2-2ubuntu3.11:1.27.2-2ubuntu3.21:1.27.2-2ubuntu3.31:1.27.2-2ubuntu3.41:1.27.2-2ubuntu3.4+esm1 | None known |
busyboxUbuntu:20.04:LTS | All versions, plus listed versions 1:1.30.1-4ubuntu41:1.30.1-4ubuntu51:1.30.1-4ubuntu61:1.30.1-4ubuntu6.11:1.30.1-4ubuntu6.21:1.30.1-4ubuntu6.31:1.30.1-4ubuntu6.41:1.30.1-4ubuntu6.5 | None known |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
busyboxUbuntu:22.04:LTS | All versions, plus listed versions 1:1.30.1-6ubuntu31:1.30.1-7ubuntu11:1.30.1-7ubuntu21:1.30.1-7ubuntu31:1.30.1-7ubuntu3.1 | None known |
busyboxUbuntu:24.04:LTS | All versions, plus listed versions 1:1.36.1-3ubuntu11:1.36.1-6ubuntu11:1.36.1-6ubuntu31:1.36.1-6ubuntu3.1 | None known |
busyboxUbuntu:26.10 | All versions, plus listed versions 1:1.37.0-7ubuntu11:1.37.0-10.1ubuntu21:1.37.0-10.1ubuntu31:1.38.0-3ubuntu11:1.38.0-3ubuntu31:1.38.0-3ubuntu4 | None known |
busyboxUbuntu:26.04:LTS | All versions, plus listed versions 1:1.37.0-4ubuntu11:1.37.0-7ubuntu1 | None known |
What each source reports
CVE List Score used
Busybox: tar deferred hardlink target resolved through a deferred symlink escapes the extraction directory
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
- Record
CVE-2026-124745- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-59
- Updated
- 2026-11-13
EUVDEUVD-2026-123407
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
- Record
EUVD-2026-123407- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Updated
- 2026-11-13
GitHub AdvisoriesGHSA-h2jx-m6c2-wg9q
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves...
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
- Record
GHSA-h2jx-m6c2-wg9q- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-59
- Updated
- 2026-11-13
NVD
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
- Record
CVE-2026-124745- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Weakness
- CWE-59
- Updated
- 2026-11-13
OSVDEBIAN-CVE-2026-124745
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
- Record
DEBIAN-CVE-2026-124745- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Updated
- 2026-11-14
OSVRHSA-2026:81391
Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
- Record
RHSA-2026:81391- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Updated
- 2026-11-13
OSVUBUNTU-CVE-2026-124745
A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.
- Record
UBUNTU-CVE-2026-124745- CVSS 3.1
- 6.3 Medium
CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N - Updated
- 2026-11-13
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| affected, aliases, published, references | EUVD, GitHub Advisories, NVD, OSV | |
| references | CVE List | |
| affected, aliases, references | NVD, OSV | |
| published | EUVD | |
| published | EUVD | |
| aliases, references | GitHub Advisories, NVD | |
| aliases, published | EUVD | |
| first indexed | CVE List |
Dates are when Every CVE recorded each change. Upstream dates may differ.
References
access.redhat.com/errata/RHSA-2026:81391
bugzilla.redhat.com/show_bug.cgi?id=2571637
nvd.nist.gov/vuln/detail/CVE-2026-124745
github.com/advisories/GHSA-h2jx-m6c2-wg9q
security-tracker.debian.org/tracker/CVE-2026-124745
Show 18 moreShow less
images.redhat.com
security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_81391.json
cve.org/CVERecord?id=CVE-2026-88842
zerodayinitiative.com/advisories/ZDI-26-705
ubuntu.com/security/CVE-2026-124745