CVE-2026-35357
uutils coreutils cp Information Disclosure via Permission Handling Race
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- High
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
CVE List Score used 4.7
uutils coreutils cp Information Disclosure via Permission Handling Race
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
- Record
CVE-2026-35357- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
EUVDEUVD-2026-24996 4.7
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
- Record
EUVD-2026-24996- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-2m8x-mvfx-gwgj 4.7
uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
- Record
GHSA-2m8x-mvfx-gwgj- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
NVD 4.7
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
- Record
CVE-2026-35357- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-35357 4.7
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
- Record
DEBIAN-CVE-2026-35357- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-02
OSVGHSA-2m8x-mvfx-gwgj 4.7
uutils coreutils has a Time-of-check Time-of-use (TOCTOU) Race Condition
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
- Record
GHSA-2m8x-mvfx-gwgj- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-367
- Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-35357 4.7
The cp utility in uutils coreutils is vulnerable to an information disclosure race condition. Destination files are initially created with umask-derived permissions (e.g., 0644) before being restricted to their final mode (e.g., 0600) later in the process. A local attacker can race to open the file during this window; once obtained, the file descriptor remains valid and readable even after the permissions are tightened, exposing sensitive or private file contents.
- Record
UBUNTU-CVE-2026-35357- CVSS 3.1
- 4.7 Medium
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N - Updated
- 2026-11-12
OSVUSN-9041-1No score
rust-coreutils vulnerabilities
It was discovered that uutils coreutils mkfifo incorrectly continued processing when a target file already existed, applying default permissions to the existing file. A local attacker could possibly use this issue to obtain sensitive information or modify file permissions unexpectedly. (CVE-2026-35341)
It was discovered that uutils coreutils dd incorrectly suppressed errors during file truncation operations. A local attacker could possibly use this issue to cause silent data corruption. (CVE-2026-35344)
It was discovered that uutils coreutils tail incorrectly followed symbolic links when using the --follow=name option. A local attacker could possibly use this issue to obtain sensitive information. (CVE-2026-35345)
It was discovered that uutils coreutils sort crashed when processing filenames containing non-UTF-8 bytes. A local attacker could possibly use this issue to cause a denial of service. (CVE-2026-35348)
It was discovered that uutils coreutils cp incorrectly preserved setuid and setgid bits when ownership changes failed. A local attacker could possibly use this issue to gain elevated privileges. (CVE-2026-35350)
It was discovered that uutils coreutils mv failed to preserve file ownership when moving files across file system boundaries. A local attacker could possibly use this issue to obtain sensitive information or cause unintended access restrictions. (CVE-2026-35351)
It was discovered that uutils coreutils mv had a time-of-check to time-of-use race condition in its extended attribute preservation logic. A local attacker with write access to a directory could possibly use this issue to modify security labels on unintended files. (CVE-2026-35354)
It was discovered that uutils coreutils cp had a race condition in its file creation logic, initially creating destination files with overly permissive modes. A local attacker could possibly use this issue to obtain sensitive information. (CVE-2026-35357)
It was discovered that uutils coreutils cp had a time-of-check to time-of-use race condition when handling symbolic links. A local attacker with write access to a directory could possibly use this issue to obtain sensitive information. (CVE-2026-35359)
It was discovered that uutils coreutils touch had a time-of-check to time-of-use race condition during file creation. A local attacker could possibly use this issue to cause data loss. (CVE-2026-35360)
It was discovered that uutils coreutils rm failed to recognize trailing slashes on the current directory path. A local attacker could possibly use this issue to cause data loss. (CVE-2026-35363)
It was discovered that uutils coreutils mv had a time-of-check to time-of-use race condition during cross-device operations. A local attacker with write access to a directory could possibly use this issue to overwrite arbitrary files. (CVE-2026-35364)
It was discovered that uutils coreutils nohup created its output file with world-readable permissions. A local attacker could possibly use this issue to obtain sensitive information. (CVE-2026-35367)
It was discovered that uutils coreutils chroot incorrectly resolved user specifications before dropping root privileges, allowing Name Service Switch modules to be loaded from the new root directory. A local attacker with write access to the chroot directory could possibly use this issue to execute arbitrary code as root. (CVE-2026-35368)
It was discovered that uutils coreutils ln failed to process filenames containing non-UTF-8 bytes, causing the utility to exit with an error. A local attacker could possibly use this issue to cause a denial of service. (CVE-2026-35373)
It was discovered that uutils coreutils split had a time-of-check to time-of-use race condition in its input and output file validation. A local attacker with write access to a directory could possibly use this issue to cause data loss. (CVE-2026-35374)
It was discovered that uutils coreutils chcon had a time-of-check to time-of-use race condition during…
- Record
USN-9041-1- Updated
- 2026-11-12
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
coreutilscrates.io | through 0.8.0 | None known |
rust-coreutilsDebian:12 | All versions, plus listed versions 0.0.17-20.0.17-30.0.17-40.0.17-50.0.17-6 Show 39 moreShow less0.0.19-10.0.19-20.0.19-30.0.20-10.0.21-10.0.22-10.0.23-10.0.23-20.0.23-30.0.24-10.0.24-20.0.26-10.0.26-20.0.26-30.0.26-40.0.26-50.0.27-10.0.27-20.0.27-30.0.30-10.0.30-20.0.30-30.0.30-3~exp10.0.30-40.10.0-10.11.0-10.11.0-20.12.0-10.6.0-10.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-60.9.0-10.9.0-20.9.0-3 | None known |
rust-coreutilsDebian:13 | All versions, plus listed versions 0.0.30-20.0.30-30.0.30-3~exp10.0.30-40.10.0-1 Show 14 moreShow less0.11.0-10.11.0-20.12.0-10.6.0-10.7.0-10.8.0-10.8.0-20.8.0-30.8.0-40.8.0-50.8.0-60.9.0-10.9.0-20.9.0-3 | None known |
rust-coreutilsDebian:14 | before 0.8.0-1, plus listed versions 0.0.30-20.0.30-30.0.30-3~exp10.0.30-40.6.0-10.7.0-1 | 0.8.0-1 |
rust-coreutilsUbuntu:24.04:LTS | All versions, plus listed versions 0.0.20-10.0.22-10.0.23-10.0.23-20.0.23-30.0.24-10.0.24-2 | None known |
rust-coreutilsUbuntu:25.10 | All versions, plus listed versions 0.0.30-10.0.30-20.0.30-2ubuntu20.1.0-0ubuntu10.1.0+git20250711.2ba3a33-0ubuntu1 Show 11 moreShow less0.1.0+git20250711.2ba3a33-0ubuntu20.1.0+git20250711.2ba3a33-0ubuntu30.1.0+git20250711.2ba3a33-0ubuntu40.1.0+git20250801.cf79675-0ubuntu10.1.0+git20250813.4af2a84-0ubuntu20.1.0+git20250813.4af2a84-0ubuntu40.1.0+git20250813.4af2a84-0ubuntu60.1.0+git20250813.4af2a84-0ubuntu70.2.2-0ubuntu10.2.2-0ubuntu20.2.2-0ubuntu2.1 | None known |
rust-coreutilsUbuntu:26.04:LTS | before 0.10.0-1ubuntu2~26.04.1, plus listed versions 0.2.2-0ubuntu20.2.2-0ubuntu40.5.0-0ubuntu10.5.0-0ubuntu20.6.0-0ubuntu10.7.0-0ubuntu10.8.0-0ubuntu3 | 0.10.0-1ubuntu2~26.04.1 |
rust-coreutilsUbuntu:26.04:LTS From an advisory covering 19 CVEs | before 0.10.0-1ubuntu2~26.04.1, plus listed versions 0.2.2-0ubuntu20.2.2-0ubuntu40.5.0-0ubuntu10.5.0-0ubuntu20.6.0-0ubuntu10.7.0-0ubuntu10.8.0-0ubuntu3 | 0.10.0-1ubuntu2~26.04.1 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| references | OSV | |
| affected, facts | OSV | |
| first indexed | CVE List, EUVD, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-35357 is a medium vulnerability (CVSS 4.7) in Uutils Coreutils, published April 22, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.09%, the 0th percentile. Fixed in rust-coreutils 0.8.0-1.
References
github.com/uutils/coreutils/issues/10011
nvd.nist.gov/vuln/detail/CVE-2026-35357
github.com/advisories/GHSA-2m8x-mvfx-gwgj
security-tracker.debian.org/tracker/CVE-2026-35357
github.com/uutils/coreutils
ubuntu.com/security/CVE-2026-35357
Show 20 moreShow less
cve.org/CVERecord?id=CVE-2026-35357
ubuntu.com/security/notices/USN-9041-1
ubuntu.com/security/CVE-2026-35341
ubuntu.com/security/CVE-2026-35344
ubuntu.com/security/CVE-2026-35345
ubuntu.com/security/CVE-2026-35348
ubuntu.com/security/CVE-2026-35350
ubuntu.com/security/CVE-2026-35351
ubuntu.com/security/CVE-2026-35354
ubuntu.com/security/CVE-2026-35359
ubuntu.com/security/CVE-2026-35360
ubuntu.com/security/CVE-2026-35363
ubuntu.com/security/CVE-2026-35364
ubuntu.com/security/CVE-2026-35367
ubuntu.com/security/CVE-2026-35368
ubuntu.com/security/CVE-2026-35373
ubuntu.com/security/CVE-2026-35374
ubuntu.com/security/CVE-2026-35376
ubuntu.com/security/CVE-2026-35377
ubuntu.com/security/CVE-2026-93658
Left out here: the rest of 1 source description. The JSON record has them.