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CVE-2026-35379

uutils coreutils tr Local Logic Error and Data Integrity Issue in Character Class Handling

A logic error in the tr utility of uutils coreutils causes the program to incorrectly define the [:graph:] and [:print:] character classes. The implementation mistakenly includes the ASCII space character (0x20) in the [:graph:] class and excludes it from the [:print:] class, effectively reversing the standard behavior established by POSIX and GNU coreutils. This vulnerability leads to unintended data modification or loss when the utility is used in automated scripts or data-cleaning pipelines that rely on standard character class semantics. For example, a command executed to delete all graphical characters while intending to preserve whitespace will incorrectly delete all ASCII spaces, potentially resulting in data corruption or logic failures in downstream processing.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35380

uutils coreutils cut Local Logic Error and Data Integrity Issue in Delimiter Parsing

A logic error in the cut utility of uutils coreutils causes the program to incorrectly interpret the literal two-byte string '' (two single quotes) as an empty delimiter. The implementation mistakenly maps this string to the NUL character for both the -d (delimiter) and --output-delimiter options. This vulnerability can lead to silent data corruption or logic errors in automated scripts and data pipelines that process strings containing these characters, as the utility may unintentionally split or join data on NUL bytes rather than the intended literal characters.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35338

uutils coreutils chmod Path Traversal Bypass of --preserve-root

A vulnerability in the chmod utility of uutils coreutils allows users to bypass the --preserve-root safety mechanism. The implementation only validates if the target path is literally / and does not canonicalize the path. An attacker or accidental user can use path variants such as /../ or symbolic links to execute destructive recursive operations (e.g., chmod -R 000) on the entire root filesystem, leading to system-wide permission loss and potential complete system breakdown.

CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35346

uutils coreutils comm Silent Data Corruption via Lossy UTF-8 Normalization

The comm utility in uutils coreutils silently corrupts data by performing lossy UTF-8 conversion on all output lines. The implementation uses String::from_utf8_lossy(), which replaces invalid UTF-8 byte sequences with the Unicode replacement character (U+FFFD). This behavior differs from GNU comm, which processes raw bytes and preserves the original input. This results in corrupted output when the utility is used to compare binary files or files using non-UTF-8 legacy encodings.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35347

uutils coreutils comm Silent Data Loss or Denial of Service via Improper Input Validation

The comm utility in uutils coreutils incorrectly consumes data from non-regular file inputs before performing comparison operations. The are_files_identical function opens and reads from both input paths to compare content without first verifying if the paths refer to regular files. If an input path is a FIFO or a pipe, this pre-read operation drains the stream, leading to silent data loss before the actual comparison logic is executed. Additionally, the utility may hang indefinitely if it attempts to pre-read from infinite streams like /dev/zero.

CVSS 3.1 · 4.4 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35349

uutils coreutils Path-Based Safety Bypass with --preserve-root

A vulnerability in the rm utility of uutils coreutils allows a bypass of the --preserve-root protection. The implementation uses a path-string check rather than comparing device and inode numbers to identify the root directory. An attacker or accidental user can bypass this safeguard by using a symbolic link that resolves to the root directory (e.g., /tmp/rootlink -> /), potentially leading to the unintended recursive deletion of the entire root filesystem.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35351

uutils coreutils mv Silent Ownership Loss in Cross-Device Operations

The mv utility in uutils coreutils fails to preserve file ownership during moves across different filesystem boundaries. The utility falls back to a copy-and-delete routine that creates the destination file using the caller's UID/GID rather than the source's metadata. This flaw breaks backups and migrations, causing files moved by a privileged user (e.g., root) to become root-owned unexpectedly, which can lead to information disclosure or restricted access for the intended owners.

CVSS 3.1 · 4.2 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35353

uutils coreutils mkdir Permission Exposure Race Condition with -m

The mkdir utility in uutils coreutils incorrectly applies permissions when using the -m flag by creating a directory with umask-derived permissions (typically 0755) before subsequently changing them to the requested mode via a separate chmod system call. In multi-user environments, this introduces a brief window where a directory intended to be private is accessible to other users, potentially leading to unauthorized data access.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35355

uutils coreutils install Arbitrary File Overwrite via Symlink TOCTOU Race

The install utility in uutils coreutils is vulnerable to a Time-of-Check to Time-of-Use (TOCTOU) race condition during file installation. The implementation unlinks an existing destination file and then recreates it using a path-based operation without the O_EXCL flag. A local attacker can exploit the window between the unlink and the subsequent creation to swap the path with a symbolic link, allowing them to redirect privileged writes to overwrite arbitrary system files.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35356

uutils coreutils install Arbitrary File Overwrite with -D via Path Component Symlink Race

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the install utility of uutils coreutils when using the -D flag. The command creates parent directories and subsequently performs a second path resolution to create the target file, neither of which is anchored to a directory file descriptor. An attacker with concurrent write access can replace a path component with a symbolic link between these operations, redirecting the privileged write to an arbitrary file system location.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35361

uutils coreutils mknod Security Label Inconsistency and Broken Cleanup on SELinux Systems

The mknod utility in uutils coreutils fails to handle security labels atomically by creating device nodes before setting the SELinux context. If labeling fails, the utility attempts cleanup using std::fs::remove_dir, which cannot remove device nodes or FIFOs. This leaves mislabeled nodes behind with incorrect default contexts, potentially allowing unauthorized access to device nodes that should have been restricted by mandatory access controls.

CVSS 3.1 · 3.4 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35362

uutils coreutils Missing TOCTOU Protection on Non-Linux Unix Platforms in Safe Traversal Module

The safe_traversal module in uutils coreutils, which provides protection against Time-of-Check to Time-of-Use (TOCTOU) symlink races using file-descriptor-relative syscalls, is incorrectly limited to Linux targets. On other Unix-like systems such as macOS and FreeBSD, the utility fails to utilize these protections, leaving directory traversal operations vulnerable to symlink race conditions.

CVSS 3.1 · 3.6 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35368

uutils coreutils chroot Local Privilege Escalation and chroot Escape in via Name Service Switch (NSS) Injection

A vulnerability exists in the chroot utility of uutils coreutils when using the --userspec option. The utility resolves the user specification via getpwnam() after entering the chroot but before dropping root privileges. On glibc-based systems, this can trigger the Name Service Switch (NSS) to load shared libraries (e.g., libnss_*.so.2) from the new root directory. If the NEWROOT is writable by an attacker, they can inject a malicious NSS module to execute arbitrary code as root, facilitating a full container escape or privilege escalation.

CVSS 3.1 · 7.2 High EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35381

uutils coreutils cut Local Logic Error and Data Integrity Issue in Output Filtering

A logic error in the cut utility of uutils coreutils causes the utility to ignore the -s (only-delimited) flag when using the -z (null-terminated) and -d '' (empty delimiter) options together. The implementation incorrectly routes this specific combination through a specialized newline-delimiter code path that fails to check the record suppression status. Consequently, uutils cut emits the entire record plus a NUL byte instead of suppressing it. This divergence from GNU coreutils behavior creates a data integrity risk for automated pipelines that rely on cut -s to filter out undelimited data.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35364

uutils coreutils mv Arbitrary File Overwrite via Cross-Device TOCTOU Race Condition

A Time-of-Check to Time-of-Use (TOCTOU) race condition exists in the mv utility of uutils coreutils during cross-device operations. The utility removes the destination path before recreating it through a copy operation. A local attacker with write access to the destination directory can exploit this window to replace the destination with a symbolic link. The subsequent privileged move operation will follow the symlink, allowing the attacker to redirect the write and overwrite an arbitrary target file with contents from the source.

CVSS 3.1 · 6.3 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35367

uutils coreutils nohup Information Disclosure via Insecure Default Output Permissions

The nohup utility in uutils coreutils creates its default output file, nohup.out, without specifying explicit restricted permissions. This causes the file to inherit umask-based permissions, typically resulting in a world-readable file (0644). In multi-user environments, this allows any user on the system to read the captured stdout/stderr output of a command, potentially exposing sensitive information. This behavior diverges from GNU coreutils, which creates nohup.out with owner-only (0600) permissions.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35377

uutils coreutils env Local Denial of Service via Improper Handling of Backslashes in Split-String Mode

A logic error in the env utility of uutils coreutils causes a failure to correctly parse command-line arguments when utilizing the -S (split-string) option. In GNU env, backslashes within single quotes are treated literally (with the exceptions of \\ and \'). However, the uutils implementation incorrectly attempts to validate these sequences, resulting in an "invalid sequence" error and an immediate process termination with an exit status of 125 when encountering valid but unrecognized sequences like \a or \x. This divergence from GNU behavior breaks compatibility for automated scripts and administrative workflows that rely on standard split-string semantics, leading to a local denial of service for those operations.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35341

uutils coreutils mkfifo Unauthorized Permission Change on Existing Files

A vulnerability in uutils coreutils mkfifo allows for the unauthorized modification of permissions on existing files. When mkfifo fails to create a FIFO because a file already exists at the target path, it fails to terminate the operation for that path and continues to execute a follow-up set_permissions call. This results in the existing file's permissions being changed to the default mode (often 644 after umask), potentially exposing sensitive files such as SSH private keys to other users on the system.

CVSS 3.1 · 7.1 High EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35354

uutils coreutils mv Security Xattr TOCTOU Race in Cross-Device

A Time-of-Check to Time-of-Use (TOCTOU) vulnerability exists in the mv utility of uutils coreutils during cross-device moves. The extended attribute (xattr) preservation logic uses multiple path-based system calls that perform fresh path-to-inode lookups for each operation. A local attacker with write access to the directory can exploit this race to swap files between calls, causing the destination file to receive an inconsistent mix of security xattrs, such as SELinux labels or file capabilities.

CVSS 3.1 · 4.7 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils
CVE-2026-35350

uutils coreutils cp Unexpected Privileged Executable Creation with -p

The cp utility in uutils coreutils fails to properly handle setuid and setgid bits when ownership preservation fails. When copying with the -p (preserve) flag, the utility applies the source mode bits even if the chown operation is unsuccessful. This can result in a user-owned copy retaining original privileged bits, creating unexpected privileged executables that violate local security policies. This differs from GNU cp, which clears these bits when ownership cannot be preserved.

CVSS 3.1 · 6.6 Medium EPSS < 1% KEV · Not listed
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Uutils
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Coreutils