GNU Wget through 1.25.0, fixed in commit 43d3ba9, contains an integer overflow vulnerability in the parse_content_range() function within src/http.c that allows server-controlled values to cause signed integer arithmetic to overflow. Attackers can supply malicious Content-Range header values to trigger undefined behavior and download desynchronization in the affected client.
GNU gzip contains a global buffer overflow vulnerability in the LZH decompression logic caused by improper reuse of shared global state between different decompression formats within a single execution. GNU gzip maintains a global array that is shared across the LZ77, LZW, and LZH decompression routines and is not reinitialized between files processed in the same invocation.
By decompressing a specially crafted LZW file followed by a specially crafted LZH file in a single gzip -d command, an attacker can poison the shared global state and subsequently trigger an out‑of‑bounds read in the LZH decoder. The LZH decompression logic follows stale values left in the shared array, causing reads past the end of the allocated global buffer.
This issue has been fixed in commits 63dbf6b3b9e6e781df1a6a64e609b10e23969681 and e7378c2d421be6a286922374425680bbe9ad8b7d.
GNU gzip contains a vulnerability in the gzexe utility related to insecure temporary file handling. When the mktemp utility is not available in the user’s PATH, gzexe falls back to constructing a temporary file path based solely on the process ID (PID). This predictable filename is created without exclusive access or existence checks.
A local attacker can pre‑create the predicted temporary file path as a symbolic link pointing to an arbitrary file writable by the victim. When gzexe runs, it follows the symlink and overwrites the target file, resulting in a time‑of‑check to time‑of‑use (TOCTOU) condition that allows arbitrary file overwrite.
This issue has been fixed in the commit 4e6f8b24ab823146ab8776f0b7fe486ab34d4269
GNU libidn before 1.44 is prone to out-of-bounds reads of uninitialized memory in the ToUnicode APIs because of mishandling in idna_to_unicode_internal. The affected code is not present in libidn2.
GNU SASL before 2.2.4 lacks sanitization of a short challenge in _gsasl_ntlm_client_step in the NTLM client, which could result in memory disclosure via a crafted server.
CVE-2026-9605 is a heap-based buffer overflow vulnerability in GNU libredwg version 0.13.4.8160, specifically in the bit_read_RC function of the Dwgbmp Utility component. This flaw allows remote attackers to cause memory corruption by manipulating input data. An exploit has been published, increasing the risk of exploitation. The vulnerability has a CVSS 4.0 base score of 6.9, indicating medium severity. A patch identified by commit 8f03865f37f5d4ffd616fef802acc980be54d300 is recommended to fix the issue.
A weakness has been identified in GNU LibreDWG up to 0.14. The impacted element is the function read_2004_compressed_section of the file src/decode.c of the component Dwgbmp Utility. Executing a manipulation can lead to out-of-bounds read. The attack requires local access. The exploit has been made available to the public and could be used for attacks. This patch is called 8f03865f37f5d4ffd616fef802acc980be54d300. It is advisable to implement a patch to correct this issue.
A security flaw has been discovered in GNU LibreDWG up to 0.14. The affected element is the function match_BLOCK_HEADER of the file dwggrep.c of the component Dwggrep Utility. Performing a manipulation results in null pointer dereference. The attack requires a local approach. The exploit has been released to the public and may be used for attacks.
A weakness has been identified in GNU LibreDWG up to 0.14. Affected is the function bit_convert_TU of the file programs/dwggrep.c of the component Dwggrep Utility. This manipulation causes out-of-bounds read. The attack needs to be launched locally. The exploit has been made available to the public and could be used for attacks. Patch name: be996bf2178a40e98720f18c2414815d244413db. Applying a patch is the recommended action to fix this issue.
A security flaw has been discovered in GNU LibreDWG up to 0.14. This impacts the function dwg_next_entity of the file src/decode.c of the component DWG File Handler. The manipulation results in null pointer dereference. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The patch is identified as 8f03865f37f5d4ffd616fef802acc980be54d300. Upgrading the affected component is advised.
A vulnerability was identified in GNU LibreDWG up to 0.14. This affects the function decompress_R2004_section of the file src/decode.c of the component Dwgread Utility. The manipulation leads to heap-based buffer overflow. The attack must be carried out locally. The exploit is publicly available and might be used. The identifier of the patch is e501cb9926c1e9a07a0d1cc997f3e69e9be801c9. To fix this issue, it is recommended to deploy a patch.
A vulnerability was determined in GNU LibreDWG up to 0.14. The impacted element is the function decompress_R2004_section of the file src/decode.c of the component Dwgread Utility. Executing a manipulation can lead to reachable assertion. The attack is restricted to local execution. The exploit has been publicly disclosed and may be utilized. This patch is called e501cb9926c1e9a07a0d1cc997f3e69e9be801c9. A patch should be applied to remediate this issue.
A vulnerability was found in GNU LibreDWG up to 0.14. The affected element is the function read_2004_compressed_section of the file src/decode.c of the component Dwgread Utility. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been made public and could be used. The project was informed of the problem early through an issue report but has not responded yet.
In GNU SASL before 2.2.3, DIGEST-MD5 has a NULL pointer dereference affecting both clients and servers, via a known token with no accompanying = character. This occurs in lib/digest-md5/getsubopt.c.
CVE-2026-1858 is a medium severity vulnerability in GNU wget2 where the software improperly validates server certificates. Specifically, wget2 accepts TLS server certificates that have incorrect Key Usage (KU) or Extended Key Usage (EKU) attributes. This flaw could allow an attacker who has compromised a certificate issued for a different purpose to reuse it for TLS server authentication, potentially undermining the security of TLS connections. No official patch or remediation guidance is currently available from the vendor. The vulnerability has not been reported as exploited in the wild.
The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.0.1 to version 2.43 fail to validate the RDATA content against the RDATA length in a DNS response when processing A6, CERT, LOC, TKEY or TSIG records, which may allow an attacker to craft a DNS response, causing a target application to crash or read uninitialized memory.
These functions are for application debugging only and hence not in the path of code executed by the DNS resolver. Further, they have been deprecated since version 2.34 and should not be used by any new applications. Applications should consider porting away from these interfaces since they may be removed in future versions.
The deprecated functions ns_printrrf, ns_printrr and fp_nquery in the GNU C Library version 2.2 and newer fail to enforce the caller-supplied buffer length, and can result in an out-of-bounds write when printing TSIG records.
CVE-2026-41990 is a medium-severity vulnerability in Libgcrypt versions before 1.12.2. It involves an out-of-bounds write related to Dilithium signing where writes to a static array lack proper bounds checking. However, the data written is not attacker-controlled, which limits the potential impact. There is no known exploit in the wild, and no official patch or remediation level has been confirmed yet.