int cast5_setkey(struct crypto_tfm *tfm, const u8 *key, unsigned int key_len)
{
	struct cast5_ctx *c = crypto_tfm_ctx(tfm);
	int i;
	u32 x[4];
	u32 z[4];
	u32 k[16];
	__be32 p_key[4];

	c->rr = key_len <= 10 ? 1 : 0;

	memset(p_key, 0, 16);
	memcpy(p_key, key, key_len);


	x[0] = be32_to_cpu(p_key[0]);
	x[1] = be32_to_cpu(p_key[1]);
	x[2] = be32_to_cpu(p_key[2]);
	x[3] = be32_to_cpu(p_key[3]);

	key_schedule(x, z, k);
	for (i = 0; i < 16; i++)
		c->Km[i] = k[i];
	key_schedule(x, z, k);
	for (i = 0; i < 16; i++)
		c->Kr[i] = k[i] & 0x1f;
	return 0;
}

This category addresses vulnerabilities caused by flawed access control mechanisms, where incorrect permission settings allow unauthorized users to access restricted resources.