int ssl3_do_uncompress(SSL *ssl, SSL3_RECORD *rr)
{
#ifndef OPENSSL_NO_COMP
    int i;

    if (rr->comp == NULL) {
        rr->comp = (unsigned char *)
            OPENSSL_malloc(SSL3_RT_MAX_ENCRYPTED_LENGTH);
    }
    if (rr->comp == NULL)
        return 0;

    i = COMP_expand_block(ssl->expand, rr->comp,
                          SSL3_RT_MAX_PLAIN_LENGTH, rr->data, (int)rr->length);
    if (i < 0)
        return 0;
    else
        rr->length = i;
    rr->data = rr->comp;
#endif
    return 1;
}

This weakness involves numeric computation errors, such as integer overflows, underflows, or precision losses, which can lead to miscalculations and exploitable behaviors in software.