pypdf can exhaust RAM via manipulated LZWDecode streams

ImpactAn attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. PatchesThis has been fixed in pypdf==6.1.3. WorkaroundsIf you cannot upgrade yet, consider applying the changes from PR...

NULL Pointer Dereference

Overview muhammara is a Create, read and modify PDF files and streams. A drop in replacement for hummusjs PDF library Affected versions of this package are vulnerable to NULL Pointer Dereference in the CreateFilterForStream process when handling PDF streams with /Filter /LZWDecode and a...

GHSA-FHP4-PR5J-46M5 Muhammara has a NULL pointer dereference in LZWDecode filter when DecodeParms omits EarlyChange key

Summary A NULL pointer dereference vulnerability exists in PDFParser::CreateFilterForStream when processing a PDF stream with /Filter /LZWDecode and a /DecodeParms dictionary that does not contain the EarlyChange key. This causes an access violation 0xC0000005 and crashes the process. Affected...

NPM: Muhammara has a NULL pointer dereference in LZWDecode filter when DecodeParms omits EarlyChange key

NPM: Muhammara has a NULL pointer dereference in LZWDecode filter when DecodeParms omits EarlyChange key vulnerability discovered by ? in WordPress Npm muhammara versions = 6.0.4...

Uncontrolled Memory Allocation

pypdf is vulnerable to uncontrolled memory allocation. The vulnerability is due to improper handling of LZWDecode streams, which allows an attacker to craft a malicious PDF that causes excessive memory consumption up to 1 GB per stream during content parsing...

UBUNTU-CVE-2025-66019

pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

CVE-2025-66019 pypdf manipulated LZWDecode streams can exhaust RAM

pypdf is a free and open-source pure-python PDF library. Prior to version 6.4.0, an attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This issue has been patch...

pypdf's LZWDecode streams be manipulated to exhaust RAM

Impact An attacker who uses this vulnerability can craft a PDF which leads to a memory usage of up to 1 GB per stream. This requires parsing the content stream of a page using the LZWDecode filter. This is a follow up to GHSA-jfx9-29x2-rv3j to align the default limit with the one for zlib. Patche...

DEBIAN-CVE-2025-62708

pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3...

CVE-2025-62708 pypdf manipulated LZWDecode streams can exhaust RAM

pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3...

CVE-2025-62708

pypdf (Python PDF library) prior to version 6.1.3 is affected by CVE-2025-62708: an attacker can craft a PDF that triggers large memory usage when parsing a page content stream using the LZWDecode filter. The issue has been fixed in pypdf 6.1.3. This is documented in the CVE entry and corroborate...

CVE-2025-62708

pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3...

CVE-2025-62708 pypdf manipulated LZWDecode streams can exhaust RAM

pypdf is a free and open-source pure-python PDF library. Prior to version 6.1.3, an attacker who uses this vulnerability can craft a PDF which leads to large memory usage. This requires parsing the content stream of a page using the LZWDecode filter. This has been fixed in pypdf version 6.1.3...

Unity Linux 20.1070e Security Update: libtiff (UTSA-2025-680618)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2025-680618 advisory. LibTIFF master branch has an out-of-bounds read in LZWDecode in libtiff/tiflzw.c:624, allowing attackers to cause a denial-of-service via a crafted tiff file. For...

The vulnerability of the LZWDecode function in the libtiff/tif_lzw.c component of the LibTIFF library, which allows a hacker to cause a service failure.

The vulnerability of the LZWDecode function in the libtiff/tiflzw.c component of the LibTIFF library is related to reading data beyond the allowable buffer limits. Exploiting this vulnerability could allow a malicious actor to cause service interruptions through a specially created TIF file...

libtiff: null pointer deference in LZWDecode() in libtiff/tif_lzw.c

A NULL pointer dereference flaw was found in Libtiff's LZWDecode function in the libtiff/tiflzw.c file. This flaw allows a local attacker to craft specific input data that can cause the program to dereference a NULL pointer when decompressing a TIFF format file, resulting in a program crash or...

Medium: libtiff

Issue Overview: A NULL pointer dereference flaw was found in Libtiff's LZWDecode function in the libtiff/tiflzw.c file. This flaw allows a local attacker to craft specific input data that can cause the program to dereference a NULL pointer when decompressing a TIFF format file, resulting in a...

SUSE CVE-2023-2731

A NULL pointer dereference flaw was found in Libtiff's LZWDecode function in the libtiff/tiflzw.c file. This flaw allows a local attacker to craft specific input data that can cause the program to dereference a NULL pointer when decompressing a TIFF format file, resulting in a program crash or...

UBUNTU-CVE-2023-2731

A NULL pointer dereference flaw was found in Libtiff's LZWDecode function in the libtiff/tiflzw.c file. This flaw allows a local attacker to craft specific input data that can cause the program to dereference a NULL pointer when decompressing a TIFF format file, resulting in a program crash or...

LibTIFF 代码问题漏洞

LibTIFF is a library for reading and writing TIFF Tagged Image File Format files. The library contains some command line tools for working with TIFF files. A denial of service vulnerability exists in LibTIFF, which stems from a NULL pointer dereference issue found in the LZWDecode function, and c...