CVE-2026-74399
Description
AI Translation Available
In the Linux kernel, the following vulnerability has been resolved:
evm: terminate and bound the evm_xattrs read buffer
evm_read_xattrs() allocates size + 1 bytes, fills them from the list of
enabled xattrs, and then passes strlen(temp) to
simple_read_from_buffer(). When no configured xattrs are enabled, the
fill loop stores nothing and temp[0] remains uninitialized, so strlen()
reads beyond initialized memory.
Explicitly terminate the buffer after allocation, use snprintf() for
each formatted line, and pass the accumulated length, without risk of
truncation, to simple_read_from_buffer().
https://git.kernel.org/stable/c/0b9f8282b40af4a99d6243d2cb939d14ff36b049
https://git.kernel.org/stable/c/11143a19f5b8dc8f414deab87571134f9f447313
https://git.kernel.org/stable/c/12ad52dc45a0c8c9d25e85b4a84201de4c5420ed
https://git.kernel.org/stable/c/38b7d63b23aa9d2ddde7688040e9426d32be4065
https://git.kernel.org/stable/c/8df81954d22a653a8b01d46692cd56f71137269b
https://git.kernel.org/stable/c/a0f64cf8bfcb39e533d9e27aeb763a8d81b7f39d
https://git.kernel.org/stable/c/a36cbfb85f26e6c6fb6529b1a364331b94dc88f3