how2heap

Educational Heap Exploitation This repo is for learning various heap exploitation techniques. We use Ubuntu's Libc releases as the gold-standard. Each technique is verified to work on corresponding Ubuntu releases. You can run apt source libc6 to download the source code of the Libc you are using...

wasm2c-tableflip

wasm2c sandbox escape: guest module runs a shell command on the host Read the blog: trustsig.eu/blog wasmrtallocatefuncreftable in wasm2c/wasm-rt-impl-tableops.inc sets table-size from the module's declared element count and then ignores the result of calloc. When the allocation fails the table i...

Astra Linux – vulnerability in linux-5.10, linux-6.1, linux, linux-5.15

In the Linux kernel, the following vulnerability has been resolved: amdkfd: use calloc instead of kzalloc to avoid integer overflow This uses calloc instead of performing the multiplication, which could lead to an overflow...

Astra Linux – vulnerability in libarchive

In libarchive versions prior to 3.6.2, the software fails to check for errors after calling the calloc function; this function may return a NULL pointer if it fails, resulting in a NULL pointer dereference. NOTE: The discoverer cites this CWE-476 observation, but other parties dispute its impact ...

Astra Linux – Vulnerability in klibc

A issue was discovered in klibc before version 2.0.9. Multiplication operations within the calloc function may lead to integer overflows and subsequent heap buffer overflows...

EUVD-2026-76923

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

DEBIAN-CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

UBUNTU-CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

Improper WebAssembly WABT exception handling vulnerability

WebAssembly WABT versions 1.0.41 and earlier contain an improper exception handling vulnerability. This flaw arises from a failure to check the return value of calloc within wasmrtallocatefuncreftable. When allocation fails, table-data remains NULL while table-size still holds the expected number...

Linux Distros Unpatched Vulnerability : CVE-2026-90648

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a table flip attack. It does not...

CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 contains a sandbox escape vulnerability ("table flip"). The root cause is an unchecked return value of calloc() in wasm_rt_allocate_funcref_table(); when allocation fails, table->data remains NULL while table->size retains the guest-declared count, ...

CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

CVE-2026-90648

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

CVE-2026-90648: Unchecked Return Value

wasm2c in WebAssembly wabt through 1.0.41 allows sandbox escape in some situations that primarily involve 32-bit platforms, aka a "table flip" attack. It does not check the return value of calloc in wasmrtallocatefuncreftable wasm2c/wasm-rt-impl-tableops.inc. When the funcref table allocation...

PT-2026-90728

Name of the Vulnerable Software and Affected Versions WebAssembly wabt versions prior to 1.0.42 Description An issue in wasm2c allows a sandbox escape, primarily on 32-bit platforms, through a method known as a table flip attack. The wasm rt allocate funcref table function in...

Unity Linux 20.1050e / 20.1060e / 20.1070-8ae / 20.1070e Security Update: p11-kit (UTSA-2026-032284)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-032284 advisory. An issue was discovered in p11-kit 0.21.1 through 0.23.21. Multiple integer overflows have been discovered in the array allocations in the p11-kit library and the...

Medium: gimp

Issue Overview: A flaw was found in the file-sgi plugin in GIMP. When processing an RLE-compressed SGI image, the plugin allocates memory for a row table. The image header dimensions ysize and zsize are read as 16-bit unsigned integers. If a crafted file sets both dimensions to their maximum valu...